2BTPM-LJCHBX20Digital Piano

Dongguan shijulvtemaoyi Co., Ltd. Address: Room 106, No.25, Changfu Road, Changshantou, Qingxi Town, Dongguan City, Guangdong Province, China Attestation Statements Not Covered Entity Applicant & Not Covered Equipment To: Federal Communications Commission Date: Dec. 31, 25 7435 Oakland Mills Road, Columbia, MD 21046, USA Ref: Information Required by Section 2.911(d)(5)(i) & (ii) FCC ID: 2BTPM-LJCHBX20 Dongguan shijulvtemaoyi Co., Ltd. (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List, established pursuant to § 1.50002 of reference chapter, as an entity producing “covered” communication equipment. The equipment for which authorization is sought is not “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List that prohibited from receiving an equipment authorization pursuant to section § 2.903 of the FCC rules. Sincerely yours, Applicant Signature Printed Name: Baoyu Zuo Title: CEO Address: Room 106, No.25, Changfu Road, Changshantou, Qingxi Town, Dongguan City, Guangdong Province, China Tel.: 13711935581 Email: [email protected]

Dongguan shijulvtemaoyi Co., Ltd. Address: Room 106, No.25, Changfu Road, Changshantou, Qingxi Town, Dongguan City, Guangdong Province, China 1 | P a g e Attestation Statements To: Federal Communications Commission Date: Dec. 31, 25 7435 Oakland Mills Road, Columbia, MD 21046, USA Subject: Attestation of Compliance with FCC Covered List Software Requirements FCC ID: [2BTPM-LJCHBX20] Product Name: [Digital Piano] This letter serves as an attestation that the equipment identified above ☐ is / ☒ is not (select one) "covered" software as defined under the Federal Communications Commission (FCC) Covered List requirements, as outlined in FCC 22-84 and KDB 986446. Specifically, the undersigned certifies that the equipment for which authorization is sought: 1. Does not contain cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors, assignees, parents, subsidiaries, affiliates, or any entity that has rebranded or relabeled software produced by the aforementioned entities. 2. Does not have the capability to store, run, or deliver any software identified on the FCC Covered List, including but not limited to cybersecurity and anti-virus software. To support this attestation, the appendix evaluation documentation has been prepared and is included in the certification filing. This attestation is based on a thorough evaluation of the device's design, functionality, and software environment. The undersigned affirms that the information provided is accurate and complete to the best of their knowledge. Sincerely yours, Applicant Signature Printed Name: Digital Piano Title: CEO Address: Room 106, No.25, Changfu Road, Changshantou, Qingxi Town, Dongguan City, Guangdong Province, China Tel.: 13711935581 Email: [email protected] Dongguan shijulvtemaoyi Co., Ltd. Address: Room 106, No.25, Changfu Road, Changshantou, Qingxi Town, Dongguan City, Guangdong Province, China 2 | P a g e Evaluation regarding to the Covered List Software: Compliance Methodology Evaluation Process Results Device is Inherent compliance ☒ The Chipset(s) used is limited to run the Cybersecurity or anti-virus software. Compliance ☒ The Memory used is limited to run the Cybersecurity or anti-virus software. Compliance ☒ There is storage capacity limitation for store or install the Cybersecurity or anti-virus software. Compliance ☒ Operating system used is limited to run, install or deliver the Cybersecurity or anti-virus software. Compliance Device is not Inherent compliance ☐ Evaluation Based on Software Bill of Materials (SBoM) See attached “SBoM“ Note:The SBoM content is limited to the scope of covered list software (e.g. antivirus and cybersecurity software). ☐ Evaluation Based on Scan for Software on the device ☐ Evaluation Based on Filesystem scan ☐ Evaluation Based on Running software check

Dongguan shijulvtemaoyi Co., Ltd. Address: Room 106, No.25, Changfu Road, Changshantou, Qingxi Town, Dongguan City, Guangdong Province, China U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: Dec. 31, 25 Ref: Attestation Statement – Part 2.911(d)(7) filing FCC ID: 2BTPM-LJCHBX20 [Dongguan shijulvtemaoyi Co., Ltd.] (“the applicant”) certifies that, as of the date of the filing of the application, [TTS MARKET INC.] (“the agent”) is our designated U.S. agent for service of process for the above reference FCC ID. The applicant accepts 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. The applicant further acknowledges it is our responsibility to inform the FCC whenever the agent information changes. [TTS MARKET INC.] ("the agent”) understand it is the 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 email address. Designated U.S. Agent Company Name:TTS MARKET INC. FRN: 0036806057 GC: N/A Address: 1178 Broadway Ste 324, New York,NY 10001. USA Signature: Contact Person: Maverick Lim Tel:001-(646) 305-2908 Email: [email protected] Applicant Company Name: Dongguan shijulvtemaoyi Co., Ltd. FRN: 0037755766 Address: Room 106, No.25, Changfu Road, Changshantou, Qingxi Town, Dongguan City, Guangdong Province, China Signature: Contact Person: Baoyu Zuo Tel: 13711935581 Email: [email protected]

Dongguan shijulvtemaoyi Co., Ltd. Address: Room 106, No.25, Changfu Road, Changshantou, Qingxi Town, Dongguan City, Guangdong Province, China (Dec. 30, 2025) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request for: FCC ID: 2BTPM-LJCHBX20 Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request permanent confidential treatment of the exhibits accompanying this certification application as outlined below : ⎯ Block Diagram ⎯ Schematics ⎯ Operational Description The above exhibits contain trade secrets and/or proprietary information that are not publicly available and materials that the Applicant has spent considerable efforts in developing. Public disclosure of these may be harmful to the Applicant and give an unfair advantage to competitors on the market. Pursuant to DA 04-1705, the applicant also requests temporary confidential treatment of the exhibits outlined below for a period of (up to 180) days from the date of equipment authorization and prior to marketing in the United States to prevent the premature release of any sensitive information. Applicant is aware of their responsibility to notify DERYCOM in the event information regarding the product or the product is made available to the public before the requested period has expired. ⎯ User Manual Sincerely, (Signature) Title: CEO Address: Room 106, No.25, Changfu Road, Changshantou, Qingxi Town, Dongguan City, Guangdong Province, China Tel.: 13711935581 Email: [email protected]

Dongguan shijulvtemaoyi Co., Ltd. Address: Room 106, No.25, Changfu Road, Changshantou, Qingxi Town, Dongguan City, Guangdong Province, China (Dec. 30, 2025) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization for FCC ID: 2BTPM-LJCHBX20 I, the undersigned, hereby authorize (Shenzhen BKC Testing Co., Ltd.) to act on our behalf in all matters relating to this application for equipment certification. Any act carried out by (Shenzhen BKC Testing Co., Ltd.) shall have the same effect as our own and I acknowledge that all responsibility for complying with the terms and conditions of certification, as specified by DERYCOM CERTIFICATION SERVICES, INC., still resides with (Dongguan shijulvtemaoyi Co., Ltd.). We 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. §862, and that no party to the application, as defined in 47 CFR §1.2002(b), is subject to a denial of federal benefits that includes FCC benefits pursuant to that section. Sincerely, (Signature) (Full name of contact person listed on FCC’s website) Baoyu Zuo (Title): CEO Tel: 13711935581 Fax: / Email: [email protected]

Report No.: BKC25125289ME-3 External Photos Model: LJCHBX20 Report No.: BKC25125289ME-3 Report No.: BKC25125289ME-3 Report No.: BKC25125289ME-3

Report No.: BKC25125289ME-4 Internal Photos Model: LJCHBX20 Report No.: BKC25125289ME-4 Antenna Report No.: BKC25125289ME-4

FCC ID: 2BTPM-LJCHBX20 RF Exposure Evaluation According to KDB 447498 D01 General RF Exposure Guidance v06 and part 2.1093， Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition(s), listed below, is (are) satisfied. For 100 MHz to 6 GHz and test separation distances ≤ 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(max. power of channel, including tune-up tolerance, mW) / (min. test separation distance, mm)] · [√f (GHz) ] ≤ 3.0 for 1-g SAR, and ≤ 7.5 for 10-g extremity SAR, where f (GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation The result is rounded to one decimal place for comparison Here, So a SAR test is not required Mode Frequen cy (MHz) Max Power (dBm) Target power W/ tolerance (dBm) Max tune up power tolerance (dBm) Max Power (mW) Min. Distance (mm) Calc. thresholds limit BT GFSK 2402 0.69 0.0±1 1.0 1.2589 5.00 0.3902 3.0 2440 -0.02 0.0±1 1.0 1.2589 5.00 0.3933 3.0 2480 -0.70 0.0±1 1.0 1.2589 5.00 0.3965 3.0 Π/4-D QPSK 2402 2.96 2.0±1 3.0 1.9953 5.00 0.6185 3.0 2440 2.31 2.0±1 3.0 1.9953 5.00 0.6233 3.0 2480 1.60 2.0±1 3.0 1.9953 5.00 0.6284 3.0 8DPS K 2402 3.47 3.0±1 4.0 2.5119 5.00 0.7786 3.0 2440 2.82 3.0±1 4.0 2.5119 5.00 0.7847 3.0 2480 2.13 3.0±1 4.0 2.5119 5.00 0.7911 3.0 BLE GFSK 2402 0.09 -0.5±1 0.5 1.1220 5.00 0.3478 3.0 2440 -0.57 -0.5±1 0.5 1.1220 5.00 0.3505 3.0 2480 -1.23 -0.5±1 0.5 1.1220 5.00 0.3534 3.0

V . S .W . R < 1.4 Polarization Type V ertical & Horizontal Frequenc Range2400 ~ 2500GHz Input Impendence(ohm) 50 E fficiency (dB) 6 6 0.2 %-3.61.91.2 Maximum Power (dBm) Gain (dBi) Peak EIRP(dBm)1.2 Tot. Rad. Pwr. (dBm)-1.2 (Input pwr – loss pwr) Produ ct specification Q uick Reference Date Antenna module on the system board Ant. Port Input Pwr. (dBm)0 (Typ. BT class 2 output power) Directivity (dBi)1 (all direction antenna) Minimum Power (dBm) Avg. Power (dBm) 0 .2 % 1.9 (Peak Gain XZ-plane) 1.7 (XY-plane) -4(XY-plane) -0.5(XY-plane) All the technical data and information contained herein are subject to change without prior notice Antenna Layout & module on the system board Antenna Gain Gain Table Unit in dBi @2.44GH zXY-planeXZ-planeYZ-plane Efficiency Peak Avg. Peak Avg. Peak Avg. Module Board -0.51.1-3.0 Return Loss The Environment of Antenna Radiation Pattern 3D radiation pattern diagram XY-planeXZ-planeYZ-plane

FCC ID_BLE (Part15.247) Test Data Report No.: BKC25125289ME-1 FCC ID: 2BTPM-LJCHBX20 Table of Contents 1. -6dB Bandwidth .......................................................................................................................................................... 2 2. 99% Occupied Bandwidth .......................................................................................................................................... 4 3. Duty Cycle ................................................................................................................................................................... 6 4. Peak Output Power..................................................................................................................................................... 8 5. Power Spectral Density ............................................................................................................................................. 10 6. Bandedge .................................................................................................................................................................. 12 7. Spurious Emission ..................................................................................................................................................... 14 Page 2 of 16 1. -6dB Bandwidth Condition Antenna Rate Frequency (MHz) -6dB BW(kHz) limit(kHz) Result NVNT ANT1 1Mbps 2402.00 508.84 500 Pass NVNT ANT1 1Mbps 2440.00 508.19 500 Pass NVNT ANT1 1Mbps 2480.00 512.47 500 Pass -6dB_Bandwidth_NVNT_ANT1_1Mbps_2402 -6dB_Bandwidth_NVNT_ANT1_1Mbps_2440 Page 3 of 16 -6dB_Bandwidth_NVNT_ANT1_1Mbps_2480 Page 4 of 16 2. 99% Occupied Bandwidth Condition Antenna Rate Frequency (MHz) 99%%BW(MHz) NVNT ANT1 1Mbps 2402.00 1.018 NVNT ANT1 1Mbps 2440.00 1.020 NVNT ANT1 1Mbps 2480.00 1.019 99%_Occupied_Bandwidth_NVNT_ANT1_1Mbps_2402 99%_Occupied_Bandwidth_NVNT_ANT1_1Mbps_2440 Page 5 of 16 99%_Occupied_Bandwidth_NVNT_ANT1_1Mbps_2480 Page 6 of 16 3. Duty Cycle Condition Antenna Rate Frequency (MHz) Dutycycle(%) Duty_factor NVNT ANT1 1Mbps 2402.00 16.13 7.92 NVNT ANT1 1Mbps 2440.00 16.13 7.92 NVNT ANT1 1Mbps 2480.00 18.75 7.27 Duty_Cycle_NVNT_ANT1_1Mbps_2402 Duty_Cycle_NVNT_ANT1_1Mbps_2440 Page 7 of 16 Duty_Cycle_NVNT_ANT1_1Mbps_2480 Page 8 of 16 4. Peak Output Power Condition Antenna Rate Frequency (MHz) Max. Conducted Power(dBm) Max. Conducted Power(mW) Limit(mW) Result NVNT ANT1 1Mbps 2402.00 0.09 1.02 1000 Pass NVNT ANT1 1Mbps 2440.00 -0.57 0.88 1000 Pass NVNT ANT1 1Mbps 2480.00 -1.23 0.75 1000 Pass Peak_Output_Power_NVNT_ANT1_1Mbps_2402 Peak_Output_Power_NVNT_ANT1_1Mbps_2440 Page 9 of 16 Peak_Output_Power_NVNT_ANT1_1Mbps_2480 Page 10 of 16 5. Power Spectral Density Condition Antenna Rate Frequency (MHz) Power Spectral Density(dBm/3kHz) Limit(dBm/3kHz) Result NVNT ANT1 1Mbps 2402.00 -18.86 8 Pass NVNT ANT1 1Mbps 2440.00 -19.98 8 Pass NVNT ANT1 1Mbps 2480.00 -20.72 8 Pass Power_Spectral_Density_NVNT_ANT1_1Mbps_2402 Power_Spectral_Density_NVNT_ANT1_1Mbps_2440 Page 11 of 16 Power_Spectral_Density_NVNT_ANT1_1Mbps_2480 Page 12 of 16 6. Bandedge Condition Antenna Modulation TX_Frequency (MHz) Max. Mark_freq(MHz) Ref_level(dBm) Spurious level(dBm) limit(dBm) Result NVNT ANT1 1Mbps 2402.00 2399.300 0.031 -45.810 -19.969 Pass NVNT ANT1 1Mbps 2480.00 2483.625 -1.336 -52.830 -21.336 Pass 1_Reference_Level_NVNT_ANT1_1Mbps_2402 2_Bandedge_NVNT_ANT1_1Mbps_2402 Page 13 of 16 1_Reference_Level_NVNT_ANT1_1Mbps_2480 2_Bandedge_NVNT_ANT1_1Mbps_2480 Page 14 of 16 7. Spurious Emission Condition Antenna Modulation TX_Frequency (MHz) Ref_level(dBm) Spurious level(dBm) limit(dBm) Result NVNT ANT1 1Mbps 2402.00 0.031 -48.948 -19.969 Pass NVNT ANT1 1Mbps 2440.00 -0.684 -48.719 -20.684 Pass NVNT ANT1 1Mbps 2480.00 -1.336 -46.618 -21.336 Pass 1_Reference_Level_NVNT_ANT1_1Mbps_2402 2_Spurious_Emission_NVNT_ANT1_1Mbps_2402 Page 15 of 16 1_Reference_Level_NVNT_ANT1_1Mbps_2440 2_Spurious_Emission_NVNT_ANT1_1Mbps_2440 Page 16 of 16 1_Reference_Level_NVNT_ANT1_1Mbps_2480 2_Spurious_Emission_NVNT_ANT1_1Mbps_2480

ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC25125289ME-1 TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage1of27 TESTREPORT Applicant:DongguanshijulvtemaoyiCo.,Ltd. Address: Room106,No.25,ChangfuRoad,Changshantou,QingxiTown, DongguanCity,GuangdongProvince,China Manufacturer: DongguanshijulvtemaoyiCo.,Ltd. Address: Room106,No.25,ChangfuRoad,Changshantou,QingxiTown, DongguanCity,GuangdongProvince,China ProductName:DigitalPiano ModelNumber:SeeSection1.1fordetails Trademark:JLCH/TEKUAI FCCID:2BTPM-LJCHBX20 TestDate: Dec.03,2025–Dec.18,2025 DateofReport: Dec.18,2025 TestResult: ThisdevicedescribedabovehasbeentestedbyBKC,andthetest resultsshowthattheequipmentundertest(EUT)isincompliance withtheStandardrequirements.Anditisapplicableonlytothetested sampleidentifiedinthereport. TestProcedureUsed: Standards:FCCCFRTitle47Part15SubpartCSection15.247 ANSIC63.10:2020 RSS-247Issue3August2023 RSS-GenIssue5,Amendment2(February2021) Preparedby(TestEngineer): CareyZheng Reviewer(Supervisor): CaseyWang Approved(Manager): JerryLiao ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC25125289ME-1 TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage2of27 TABLEOFCONTENT 1.GeneralInformation......................................................................................4 1.1.DescriptionofDevice(EUT).......................................................................................................................4 1.2.ChannelList..................................................................................................................................................4 1.3.Summaryoftestresult................................................................................................................................5 1.4.SpecialAccessoriesandAuxiliaryEquipment........................................................................................5 1.5.Testmode......................................................................................................................................................5 1.6.BlockDiagram...............................................................................................................................................6 1.7.TestConditions.............................................................................................................................................6 1.8.MeasurementUncertainty(95%confidencelevels,k=2)......................................................................6 1.9.TestFacility....................................................................................................................................................7 1.10.TestEquipment...........................................................................................................................................7 2.Conductedemissionatthemainsterminalstest......................................9 2.1.Limit................................................................................................................................................................9 2.2.TestSetup......................................................................................................................................................9 2.3.TestProcedure..............................................................................................................................................9 2.4.TestResult...................................................................................................................................................10 3.RadiatedSpuriousEmissions...................................................................12 3.1.Limit..............................................................................................................................................................12 3.2.TestSetup....................................................................................................................................................13 3.3.TestProcedure............................................................................................................................................15 3.4.TestResult...................................................................................................................................................16 4.ConductedSpuriousEmissions................................................................21 4.1.Limit..............................................................................................................................................................21 4.2.TestSetup....................................................................................................................................................21 4.3.TestProcedure............................................................................................................................................21 4.4.TestResult...................................................................................................................................................21 5.BandEdgeMeasurement...........................................................................22 5.1.Limit..............................................................................................................................................................22 5.2.Testsetup....................................................................................................................................................22 5.3.TestProcedure............................................................................................................................................22 5.4.TestResult...................................................................................................................................................22 6.-6dBBandwidthand99%BandwidthMeasurement..............................23 6.1.Limit......................................................................................…

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Report No.: BKC25125289ME-2 EUT TEST PHOTO Model: LJCHBX20 Report No.: BKC25125289ME-2