2ARBY-LUHN451SNeoClassic 450S Smart Ultrasonic Cool Mist Humidifier

Applicant Declaration QSF27-14-04 Rev 1.4 April 25, 2025 Page 1 of 1 Original Issue: Jan. 4, 2021 SGS North America Inc. 620 Old Peachtree Road SUITE 100 Suwanee, Georgia 30024 United States Applicant Legal Business Name AROVAST Corporation Address 1775 FLIGHT WAY, SUITE 150,TUSTIN, CA 92782,USA FRN 0027859651 Grantee Code 2ARBY FCC ID: 2ARBY-LUHN451S Authorized Contact Name Wayne Pan Contact Phone N/A Contact Email [email protected] I, the undersigned, certify that I am an authorized signatory for the Applicant and therefore declare; a) in accordance with 47CFR2.911(d), all of the statements herein and the exhibits attached hereto are true and correct to the best of my knowledge and belief. b) in accepting a Grant of Equipment Authorization issued by a TCB, under the authority of the FCC, as a result of the representations made in this application, the Applicant is responsible for: (1) labeling the equipment with the exact FCC ID as specified in this application, (2) compliance statement labeling pursuant to the applicable rules, (3) compliance of the equipment with the applicable technical rules, c) if the Applicant is not the actual manufacturer of the equipment, appropriate arrangements have been made with the manufacturer to ensure that production units of this equipment will continue to comply with the FCC’s technical requirements. d) in accordance with 47 CFR 2.909 and KDB394321, the Applicant has read, understood and agrees to accept that they are the responsible party and agree to abide by their responsibilities as specified under 47 CFR 2.909 and KDB394321. e) in accordance with ISO 17065, FCC KDB641163, FCC KDB610077, KDB394321 and RSP-100, the Applicant has read, understood, accepts and agrees to abide by the post market surveillance requirements. (1) the Applicant understands, accepts and agrees that a sample may be requested for surveillance testing. (2) the Applicant shall make provisions to always have a production sample available upon request by SGS, FCC and/or ISED. (3) the Applicant shall, upon request by SGS, at the Applicant’s expense, provide a production sample of the requested product to SGS, FCC and/or ISED as instructed. The sample shall include all support devices, cables, software, accessories or other hardware or software required for evaluation, review, certification and audit surveillance of products certified by SGS. f) neither the Applicant nor any party to the application is subject to a denial of Federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. §862 because of a conviction for possession or distribution of a controlled substance. See 47CFR 1.2002(b) for the definition of a “party” for these purposes. g) the Applicant has read, understood, accepts and agrees to abide by the SGS North America, Inc. terms and conditions as specified in the TCB Application Form 731 (QSF27-14-01). Link to CFRs: https://www.fcc.gov/wireless/bureau-divisions/technologies-systems-and-innovation-division/rules-regulations-title-47 Link to KDBs: https://apps.fcc.gov/oetcf/kdb/index.cfm Link to RSP-100: https://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf01130.html Link to the Covered List: Covered List Applicant Signature: Date: 2025-11-25 Print Name: Wayne Pan Title: Director *NOTE: This declaration cannot be signed by an Agent, it shall be signed by an authorized person listed in the FCC database

FCC COVERED LIST DECLARATION LETTER Page 1 of 1 Revision 1.0 SGS North America Inc. 620 Old Peachtree Road SUITE 100 Suwanee, Georgia 30024 United States Applicant Legal Business Name AROVAST Corporation Address 1775 FLIGHT WAY, SUITE 150,TUSTIN, CA 92782,USA FRN 0027859651 Grantee Code 2ARBY FCC ID: 2ARBY-LUHN451S Authorized Contact Name Wayne Pan Contact Phone Contact Email [email protected] AROVAST Corporation (“the applicant”) certifies: - the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. - as of the date of the filing of the application, the applicant [is not] identified on the Covered list, established pursuant to §1.50002, as an entity producing “covered” equipment. - the software to be loaded prior to marketing of the equipment identified above is not “covered” software manufactured by any entity including predecessors, successors, parents, subsidiaries, affiliates or any entity which has rebranded or relabeled the software produced by the entity(ies) identified on the “Covered List”. - the device is not capable of storing or running software listed on the covered list and therefore is inherently compliant. NOTE: Justification/evidence explaining how compliance is met must accompany this letter Link to the Covered List: Covered List Applicant Signature: Date: 2025-11-25 Print Name: Wayne Pan Title: Director *NOTE: This declaration cannot be signed by an Agent, it shall be signed by an authorized person listed in the FCC database -

UNITED STATES DESIGNATED AGENT LETTER Date: 11/25/2025 TO: Federal Communication Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MID 21046 Applicant U.S. designated agent Company Name: Arovast Corporation Company Name: Arovast Corporation FRN: 0027859651 FRN: 0027859651 Grantee Code: 2ARBY Contact Name: Wayne Pan Contact Name: Wayne Pan Address: 1775 FLIGHT WAY, SUITE 150 Address: 1775 FLIGHT WAY, SUITE 150 City/Province/Zip: TUSTIN California 92782 United States City/Province/Zip: TUSTIN California 92782 United States Telephone: 7145091019 Telephone: 7145091019 Fax: N.A. Fax: N.A. Email: [email protected] Email: [email protected] Regarding: FCC ID: 2ARBY-LUHN451S We, < Arovast Corporation > understand and acknowledge the applicants consent and the designated agent’s obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and e-mail of the designated agent listed above. We, < Arovast Corporation > acknowledge the applicant’s acceptance of its obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. Name (Printed): Wayne Pan Title: Director Signature:

AROVAST Corporation To: Federal Communication Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MID 21046 Regarding: Confidentiality Request regarding application for FCC ID: 2ARBY-LUHN451S LONG TERM CONFIDENTIALITY Pursuant to 47 CFR Section 0.459 and 0.457 of the commission’s rules, the applicant hereby request confidential treatment of the documents listed below, associated with the certification application referenced above. Schematic(s) Block Diagrams Operational Descriptions The documents above contain proprietary information not released to the public. Public disclosure of this information may prove harmful to the business of the applicant. SHORT TERM CONFIDENTIALITY Additionally, the applicant requests the following documents be held confidential until the device is marketed or 180 days from the grant date, whichever is less. If the device is marketed within aforementioned days of the Grant Date, the applicant will notify the TCB per FCC KDB 726920 D01 Confidentiality Request Procedures. External Photos Internal Photos Test Setup Photos User manual(s) Sincerely, Print Name: Wayne Pan Title: Director Signature: On behalf of Company: AROVAST Corporation E-mail: [email protected]

AROVAST Corporation Date: 11-25-2025 TO: Federal Communication Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MID 21046 Regarding: FCC ID: 2ARBY-LUHN451S To whom it may concern: We, the undersigned, hereby authorize SGS-CSTC Standards Technical Services Co., Ltd. (SGS) and Kobe Jian in SGS-CSTC Standards Technical Services Co., Ltd. (SGS) to act on our behalf in all manners relating to application for equipment authorization with respect to the FCC ID above, including signing of all documents relating to these matters. Any and all acts carried out by the agent on our behalf shall have the same effect as acts of our own. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). Where our agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for Certification, as specified by SGS North America, Inc., still resides with AROVAST Corporation. This authorization is valid until further written notice from the applicant. Print Name: Wayne Pan Title: Director Signature: On behalf of Company: AROVAST Corporation E-mail: [email protected]

SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511604 Page: 1 of 11 Keny Xu EMC Laboratory Manager RF Exposure Report Application No.: SZCR2511005116HS Applicant: AROVAST Corporation Address of Applicant: 1775 FLIGHT WAY, SUITE 150 TUSTIN, CA 92782, USA Manufacturer: AROVAST Corporation Address of Manufacturer: 1775 FLIGHT WAY, SUITE 150 TUSTIN, CA 92782, USA Equipment Under Test (EUT): EUT Name: NeoClassic 450S Smart Ultrasonic Cool Mist Humidifier Model No.: LUH-N451S-WUS, LUH-N451S-WCA, LUH-N451S-XXXX (X=A~Z,0~9 or blank, represents different appearance and sales area)  Trade Mark: Please refer to section 2.2 of this report which indicates which model was actually tested and which were electrically identical. FCC ID: Levoit Standard(s) : FCC Rules 47 CFR §2.1091 KDB 447498 D04 interim General RF Exposure Guidance v01 Date of Receipt: 2025-11-20 Date of Test: 2025-11-26 to 2025-12-08 Date of Issue: 2025-12-11 Test Result: Pass* * In the configuration tested, the EUT complied with the standards specified above. SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511604 Page: 2 of 11 Revision Record Version Chapter Date Modifier Remark 01 2025-12-11 Original Authorized for issue by: Martin Tang/Project Engineer Eric Fu/Reviewer SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511604 Page: 3 of 11 1 Contents Page 1 Contents ...................................................................................................................................... 3 2 General Information..................................................................................................................... 4 2.1 General Description of E.U.T. ................................................................................................ 4 2.2 Details of E.U.T. .................................................................................................................... 4 2.3 Test Location ........................................................................................................................ 6 2.4 Test Facility ........................................................................................................................... 6 2.5 Deviation from Standards ...................................................................................................... 6 2.6 Abnormalities from Standard Conditions ................................................................................ 6 3 FCC Radiofrequency radiation exposure limits ......................................................................... 7 3.1 Blanket 1 mW Blanket Exemption .......................................................................................... 7 3.2 MPE-based Exemption .......................................................................................................... 7 3.3 SAR-based Exemption .......................................................................................................... 8 4 Measurement and Calculation .................................................................................................. 11 4.1 Maximum transmit power .................................................................................................... 11 5 EUT Constructional Details (EUT Photos) ................................................................................ 11 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511604 Page: 4 of 11 2 General Information 2.1 General Description of E.U.T. Product Type: Portable device Mobile device Fixed device 2.2 Details of E.U.T. Power supply: Input:AC 120V/60Hz Cable(s): Undetachable AC cable: about 1.55m unshielded For BLE: Operation Frequency: 2402MHz to 2480MHz Bluetooth Version: V5.0 LE Modulation Type: GFSK Number of Channels: 40 Data Rate: 1Mbps, 2Mbps Channel Spacing: 2MHz Antenna Type: PCB Antenna Antenna Gain: 0dBi For 2.4G WIFI: Operation Frequency: 802.11b/g/n(HT20): 2412MHz to 2462MHz;802.11n(HT40): 2422MHz to 2452MHz Modulation Type: 802.11b: DSSS (DBPSK, DQPSK, CCK); 802.11g/n: OFDM (BPSK, QPSK, 16QAM, 64QAM) Number of Channels: 802.11b/g/n(HT20):11;802.11n(HT40):7 Channel Spacing: 5MHz Antenna Type: PCB Antenna Antenna Gain: 0dBi Remark:The information in this section is provided by the applicant or manufacturer, SGS is not liable to the accuracy, suitability, reliability or/and integrity of the information. SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511604 Page: 5 of 11 Declaration of EUT Family Grouping: Model No.: LUH-N451S-WUS, LUH-N451S-WCA, LUH-N451S-XXXX (X=A~Z,0~9 or blank, represents different appearance and sales area) Only the model LUH-N451S-WUS was tested, since according to the declaration from the applicant, the electrical circuit design, layout, components used, internal wiring and functions were identical for the above models, with only difference on model No., color and naming rules. Separation Distance Minimum test separation distance: 20cm Remark: This minimum test separation distance is determined by the smallest distance from the antenna and radiating structures or outer surface of the device, according to the host form factor, exposure conditions and platform requirements, to any part of the body or extremity of a user or bystander. SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511604 Page: 6 of 11 2.3 Test Location All tests were performed at: SGS-CSTC Standards Technical Services Co., Ltd., Shenzhen Branch No. 1 Workshop, M-10, Middle Section, Science & Technology Park, Nanshan District, Shenzhen, Guangdong, China. 518057. Tel: +86 755 2601 2053 Fax: +86 755 2671 0594 No tests were sub-contracted. 2.4 Test Facility • A2LA (Certificat…

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SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 124 of 158 802.11n(HT20)_LCH_2412MHz_Ant1 (SISO)_NTNV 802.11n(HT20)_MCH_2437MHz_Ant1 (SISO)_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 125 of 158 802.11n(HT20)_HCH_2462MHz_Ant1 (SISO)_NTNV 802.11n(HT40)_LCH_2422MHz_Ant1 (SISO)_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 126 of 158 802.11n(HT40)_MCH_2437MHz_Ant1 (SISO)_NTNV 802.11n(HT40)_HCH_2452MHz_Ant1 (SISO)_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 127 of 158 2.2.2 6dB BW 802.11b_LCH_2412MHz_Ant1 (SISO)_NTNV 802.11b_MCH_2437MHz_Ant1 (SISO)_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 128 of 158 802.11b_HCH_2462MHz_Ant1 (SISO)_NTNV 802.11g_LCH_2412MHz_Ant1 (SISO)_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 129 of 158 802.11g_MCH_2437MHz_Ant1 (SISO)_NTNV 802.11g_HCH_2462MHz_Ant1 (SISO)_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 130 of 158 802.11n(HT20)_LCH_2412MHz_Ant1 (SISO)_NTNV 802.11n(HT20)_MCH_2437MHz_Ant1 (SISO)_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 131 of 158 802.11n(HT20)_HCH_2462MHz_Ant1 (SISO)_NTNV 802.11n(HT40)_LCH_2422MHz_Ant1 (SISO)_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 132 of 158 802.11n(HT40)_MCH_2437MHz_Ant1 (SISO)_NTNV 802.11n(HT40)_HCH_2452MHz_Ant1 (SISO)_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 133 of 158 3. Maximum Conducted Output Power 3.1 Test Result 3.1.1 Power Mode TX Type Frequency (MHz) Maximum Average Conducted Output Power (dBm) Verdict ANT1 Limit 802.11b SISO 2412 12.77 <=30 Pass 2437 12.97 <=30 Pass 2462 12.94 <=30 Pass 802.11g SISO 2412 13.06 <=30 Pass 2437 13.17 <=30 Pass 2462 13.24 <=30 Pass 802.11n (HT20) SISO 2412 12.63 <=30 Pass 2437 12.92 <=30 Pass 2462 12.92 <=30 Pass 802.11n (HT40) SISO 2422 12.82 <=30 Pass 2437 12.77 <=30 Pass 2452 12.55 <=30 Pass Note1: Antenna Gain: Ant1: 0.00dBi; SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 134 of 158 4. Maximum Power Spectral Density 4.1 Test Result 4.1.1 PSD Mode TX Type Frequency (MHz) Maximum PSD (dBm) Verdict ANT1 Limit 802.11b SISO 2412 -1.64 <=8 Pass 2437 -1.24 <=8 Pass 2462 -1.57 <=8 Pass 802.11g SISO 2412 -4.11 <=8 Pass 2437 -3.87 <=8 Pass 2462 -3.97 <=8 Pass 802.11n (HT20) SISO 2412 -4.58 <=8 Pass 2437 -4.61 <=8 Pass 2462 -4.20 <=8 Pass 802.11n (HT40) SISO 2422 -7.08 <=8 Pass 2437 -7.33 <=8 Pass 2452 -7.21 <=8 Pass Note1: Antenna Gain: Ant1: 0.00dBi; SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 135 of 158 4.2 Test Graph 4.2.1 PSD 802.11b_LCH_2412MHz_Ant1 (SISO)_NTNV 802.11b_MCH_2437MHz_Ant1 (SISO)_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 136 of 158 802.11b_HCH_2462MHz_Ant1 (SISO)_NTNV 802.11g_LCH_2412MHz_Ant1 (SISO)_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 137 of 158 802.11g_MCH_2437MHz_Ant1 (SISO)_NTNV 802.11g_HCH_2462MHz_Ant1 (SISO)_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 138 of 158 802.11n(HT20)_LCH_2412MHz_Ant1 (SISO)_NTNV 802.11n(HT20)_MCH_2437MHz_Ant1 (SISO)_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 139 of 158 802.11n(HT20)_HCH_2462MHz_Ant1 (SISO)_NTNV 802.11n(HT40)_LCH_2422MHz_Ant1 (SISO)_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 140 of 158 802.11n(HT40)_MCH_2437MHz_Ant1 (SISO)_NTNV 802.11n(HT40)_HCH_2452MHz_Ant1 (SISO)_NTNV SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 141 of 158 5. Unwanted Emissions In Non-restricted Frequency Bands 5.1 Test Result 5.1.1 Ref Mode TX Type Frequency (MHz) ANT Level of Reference (dBm) 802.11b SISO 2412 1 8.72 2437 1 9.09 2462 1 8.66 802.11g SISO 2412 1 4.52 2437 1 5.36 2462 1 4.80 802.11n (HT20) SISO 2412 1 4.68 2437 1 5.06 2462 1 5.09 802.11n (HT40) SISO 2422 1 2.20 2437 1 2.29 2452 1 1.90 Note1: Refer to FCC Part 15.247 (d) and ANSI C63.10-2020, the channel contains the maximum PSD level was used to establish the reference level. 5.1.2 CSE Mode TX Type Frequency (MHz) ANT Level of Reference (dBm) Limit (dBm) Verdict 802.11b SISO 2412 1 9.09 -20.91 Pass 2437 1 9.09 -20.91 Pass 2462 1 9.09 -20.91 Pass 802.11g SISO 2412 1 5.36 -24.64 Pass 2437 1 5.36 -24.64 Pass 2462 1 5.36 -24.64 Pass 802.11n (HT20) SISO 2412 1 5.09 -24.91 Pass 2437 1 5.09 -24.91 Pass 2462 1 5.09 -24.91 Pass SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 142 of 158 802.11n (HT40) SISO 2422 1 2.29 -27.71 Pass 2437 1 2.29 -27.71 Pass 2452 1 2.29 -27.71 Pass Note1: Refer to FCC Part 15.247 (d) and ANSI C63.10-2020, the channel contains the maximum PSD level was used to establish the reference level. SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 143 of 158 5.2 Test Graph 5.2.1 Ref 802.11b_LCH_2412MHz_An…

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SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 1 of 158 Keny Xu EMC Laboratory Manager TEST REPORT Application No.: SZCR2511005116HS Applicant: AROVAST Corporation Address of Applicant: 1775 FLIGHT WAY, SUITE 150 TUSTIN, CA 92782, USA Manufacturer: AROVAST Corporation Address of Manufacturer: 1775 FLIGHT WAY, SUITE 150 TUSTIN, CA 92782, USA Equipment Under Test (EUT): EUT Name: NeoClassic 450S Smart Ultrasonic Cool Mist Humidifier Model No.: LUH-N451S-WUS, LUH-N451S-WCA, LUH-N451S-XXXX (X=A~Z,0~9 or blank, represents different appearance and sales area)   Please refer to section 2 of this report which indicates which model was actually tested and which were electrically identical. Trade Mark: Levoit FCC ID: 2ARBY-LUHN451S Standard(s) : 47 CFR Part 15, Subpart C 15.247 Date of Receipt: 2025-11-20 Date of Test: 2025-11-26 to 2025-12-08 Date of Issue: 2025-12-11 Test Result: Pass* * In the configuration tested, the EUT complied with the standards specified above. SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 2 of 158 Revision Record Version Chapter Date Modifier Remark 01 2025-12-11 Original Authorized for issue by: Martin Tang/Project Engineer Eric Fu/Reviewer SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 3 of 158 2 Test Summary Radio Spectrum Technical Requirement Item Standard Method Requirement Result Antenna Requirement 47 CFR Part 15, Subpart C 15.247 N/A 47 CFR Part 15, Subpart C 15.203 & 15.247(b)(4) Pass Radio Spectrum Matter Part Item Standard Method Requirement Result Conducted Emissions at AC Power Line (150kHz-30MHz) 47 CFR Part 15, Subpart C 15.247 ANSI C63.10 (2020) Section 6.2 47 CFR Part 15, Subpart C 15.207 Pass Radiated Emissions which fall in the restricted bands ANSI C63.10 (2020) Section 6.10.5 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass Radiated Spurious Emissions Below 1GHz ANSI C63.10 (2020) Section 6.4,6.5 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass Radiated Spurious Emissions Above 1GHz ANSI C63.10 (2020) Section 6.6 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass Conducted Average Output Power ANSI C63.10 (2020) Section 11.9.2 47 CFR Part 15, Subpart C 15.247(b)(3) Pass Minimum 6dB Bandwidth ANSI C63.10 (2020) Section 11.8.1 47 CFR Part 15, Subpart C 15.247a(2) Pass Power Spectrum Density ANSI C63.10 (2020) Section 11.10.3 47 CFR Part 15, Subpart C 15.247(e) Pass Conducted Band Edges Measurement ANSI C63.10 (2020) Section 6.10.4 47 CFR Part 15, Subpart C 15.247(d) Pass Conducted Spurious Emissions ANSI C63.10 (2020) Section 11.11 47 CFR Part 15, Subpart C 15.247(d) Pass Declaration of EUT Family Grouping: Model No.: LUH-N451S-WUS, LUH-N451S-WCA, LUH-N451S-XXXX (X=A~Z,0~9 or blank, represents different appearance and sales area) Only the model LUH-N451S-WUS was tested, since according to the declaration from the applicant, the electrical circuit design, layout, components used, internal wiring and functions were identical for the above models, with only difference on color and naming rules. SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511603 Page: 4 of 158 3 Contents Page 1 Cover Page ................................................................................................................................................ 1 2 Test Summary ........................................................................................................................................... 3 3 Contents .................................................................................................................................................... 4 4 General Information .................................................................................................................................. 6 4.1 Details of E.U.T. ................................................................................................................................. 6 4.2 Description of Support Units .............................................................................................................. 6 4.3 Measurement Uncertainty .................................................................................................................. 6 4.4 Test Location ...................................................................................................................................... 7 4.5 Test Facility ........................................................................................................................................ 7 4.6 Deviation from Standards ................................................................................................................... 7 4.7 Abnormalities from Standard Conditions ........................................................................................... 7 5 Equipment List .......................................................................................................................................... 8 6 Radio Spectrum Technical Requirement ............................................................................................. 10 6.1 Antenna Requirement ...................................................................................................................... 10 6.1.1 Test Requirement: ....................................................................................................................... 10 6.1.2 Conclusion ................................................................................................................................... 10 7 Radio Spectrum Matter Test Results .................................................................................................... 11 7.1 Conducted Emissions at AC Power Line (150kHz-30MHz) ............................................…

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SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511602 Page: 1 of 97 Keny Xu EMC Laboratory Manager TEST REPORT Application No.: SZCR2511005116HS Applicant: AROVAST Corporation Address of Applicant: 1775 FLIGHT WAY, SUITE 150 TUSTIN, CA 92782, USA Manufacturer: AROVAST Corporation Address of Manufacturer: 1775 FLIGHT WAY, SUITE 150 TUSTIN, CA 92782, USA Equipment Under Test (EUT): EUT Name: NeoClassic 450S Smart Ultrasonic Cool Mist Humidifier Model No.: LUH-N451S-WUS, LUH-N451S-WCA, LUH-N451S-XXXX (X=A~Z,0~9 or blank, represents different appearance and sales area)   Please refer to section 2 of this report which indicates which model was actually tested and which were electrically identical. Trade Mark: Levoit FCC ID: 2ARBY-LUHN451S Standard(s) : 47 CFR Part 15, Subpart C 15.247 Date of Receipt: 2025-11-20 Date of Test: 2025-11-26 to 2025-12-08 Date of Issue: 2025-12-11 Test Result: Pass* * In the configuration tested, the EUT complied with the standards specified above. SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511602 Page: 2 of 97 Revision Record Version Chapter Date Modifier Remark 01 2025-12-11 Original Authorized for issue by: Martin Tang/Project Engineer Eric Fu/Reviewer SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100511602 Page: 3 of 97 2 Test Summary Radio Spectrum Technical Requirement Item Standard Method Requirement Result Antenna Requirement 47 CFR Part 15, Subpart C 15.247 N/A 47 CFR Part 15, Subpart C 15.203 & 15.247(b)(4) Pass Radio Spectrum Matter Part Item Standard Method Requirement Result Conducted Emissions at AC Power Line (150kHz-30MHz) 47 CFR Part 15, Subpart C 15.247 ANSI C63.10 (2020) Section 6.2 47 CFR Part 15, Subpart C 15.207 Pass Radiated Emissions which fall in the restricted bands ANSI C63.10 (2020) Section 6.10.5 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass Radiated Spurious Emissions Below 1GHz ANSI C63.10 (2020) Section 6.4,6.5 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass Radiated Spurious Emissions Above 1GHz ANSI C63.10 (2020) Section 6.6 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass Conducted Peak Output Power ANSI C63.10 (2020) Section 11.9.1 47 CFR Part 15, Subpart C 15.247(b)(3) Pass Minimum 6dB Bandwidth ANSI C63.10 (2020) Section 11.8.1 47 CFR Part 15, Subpart C 15.247a(2) Pass Power Spectrum Density ANSI C63.10 (2020) Section 11.10.2 47 CFR Part 15, Subpart C 15.247(e) Pass Conducted Band Edges Measurement ANSI C63.10 (2020) Section 6.10.4 47 CFR Part 15, Subpart C 15.247(d) Pass Conducted Spurious Emissions ANSI C63.10 (2020) Section 11.11 47 CFR Part 15, Subpart C 15.247(d) Pass Declaration of EUT Family Grouping: Model No.: LUH-N451S-WUS, LUH-N451S-WCA, LUH-N451S-XXXX (X=A~Z,0~9 or blank, represents different appearance and sales area) Only the model LUH-N451S-WUS…

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