2BCHS-CRDAMLWYString Lights

shenzhenshichaorendakejiyouxiangongsi Haiwailianyi Building 1303-1180 Yingchun Road 12th Nanhu Street Jiabei Community, Luohu District Shenzhen, Guangdong China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 2024-9-8 To whom it may concern: We, shenzhenshichaorendakejiyouxiangongsi, hereby certify that the equipment for which authorization is sought (FCC ID: 2BCHS-CRDAMLWY) is not “covered” equipment prohibited from receiving an equipment authorization pursuant to § 2.903 of the FCC rules. We also certify that, as of the date of the filing of the application, we are not identified on the Covered List (https://www.fcc.gov/supplychain/coveredlist) as an entity producing “covered” equipment. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(b) and (d)(5) and (6). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. Sincerely, Signature CAO YAN Owner shenzhenshichaorendakejiyouxiangongsi 62_[model] CoveredEqu_2.911(d)(5)(i) and (ii) - U, V03

shenzhenshichaorendakejiyouxiangongsi Add: Haiwailianyi Building 1303-1180 Yingchun Road 12th Nanhu Street Jiabei Community, Luohu District Shenzhen, Guangdong China Date: 2024-9-8 FCC ID: 2BCHS-CRDAMLWY Dear Sir/Madam, We, shenzhenshichaorendakejiyouxiangongsi Hereby declares the following statement for Federal Communications Commission, PCB board, circuit, structure and internal of these model(s) are the same, Only model number is different for these model: Product name: String Lights Model no.: SL-SPLM-C, SL-SPLM-WW, SL-SPLM-CW, SL-SPLM-RGB, SL-SPLM-B, APP-SL-B, APP-SL-C, APP-SL-RGB, APP-SL-CW, APP-SL-WW, SL-BLM-C, SL-BLM-WW, SL-BLM-CW, SL-BLM-RGB, SL-BLM-B, APPC-SPLM1*1-C, APPC-SPLM1.5*1-C, APPC-SPLM2*2-C, APPC-SPLM3*3-C, CTree-RCTrans, CTree-RCGreen, CTree-AppRCGreen, CTree-AppRCTrans, CTLeaf-AppRCGreen Sincerely, Name/Title： CAO YAN/Owner Company: shenzhenshichaorendakejiyouxiangongsi Address: Haiwailianyi Building 1303-1180 Yingchun Road 12th Nanhu Street Jiabei Community, Luohu District Shenzhen, Guangdong China Phone: 13538214502 Fax: N/A E-Mail: [email protected]

CONFIDENTIALITY REQUEST for Certification Service in USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21046 Date:<2024-9-8> Pursuant to Paragraphs §0.457 and 0.459 of the Commission’s Rules (47 C.F.R.) and Section §552(b)(4) of the Freedom of Information Act, we requests confidentiality for the following products: FCC ID Model name 2BCHS-CRDAMLWY SL-SPLM-C For the product stated above, we request that the following information be held confidential; Exhibits Long-Term Confidentiality Short-Term Confidentiality Short-Term Confidentiality Days External Photos Internal Photos Block Diagram Schematics Test Setup Photos User’s Manual Parts List Tune Up Operational Descriptions The long-term confidentiality exhibits contain our trade secrets and proprietary information that could be of benefit to our competitors. The short-term confidentiality on the basis of ensuring that business sensitive information remains confidential until the actual marketing of our new device. If you have any questions, please feel free to contact me at the address shown below. Sincerely, Name/Title： CAO YAN/Owner Company: shenzhenshichaorendakejiyouxiangongsi Address: Haiwailianyi Building 1303-1180 Yingchun Road 12th Nanhu Street Jiabei Community, Luohu District Shenzhen, Guangdong China Phone: 13538214502 Fax: N/A E-Mail: [email protected]

shenzhenshichaorendakejiyouxiangongsi Haiwailianyi Building 1303-1180 Yingchun Road 12th Nanhu Street Jiabei Community, Luohu District Shenzhen, Guangdong China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 2024-9-8 To whom it may concern: We, the undersigned, hereby authorize Eurofins Product Service GmbH to act on our behalf in all matters relating to applications for equipment authorization FCC ID: 2BCHS-CRDAMLWY including the signing of all documents related to these matters. Any and all acts carried out by Eurofins Product Service GmbH on our behalf shall have the same effect as acts of our own. By signing this application form, we agree to Eurofins’ current valid General Terms and Conditions (AGB),Testing and Certification Regulations (PZO) which can be viewed on following website www.eurofins.de/ee or retrieved on request. We also hereby certify that no party to this application is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. Sincerely, Name/Title： CAO YAN/Owner Company: shenzhenshichaorendakejiyouxiangongsi Address: Haiwailianyi Building 1303-1180 Yingchun Road 12th Nanhu Street Jiabei Community, Luohu District Shenzhen, Guangdong China Phone: 13538214502 Fax: N/A E-Mail: [email protected]

Shenzhen HTT Technology Co., Ltd. Report No.: HTT202409014 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 1 of 4 Product Name: String Lights Model No.: SL-SPLM-C EUT Constructional Details External Photo Report No.: HTT202409014 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 2 of 4 Report No.: HTT202409014 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 3 of 4 Report No.: HTT202409014 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 4 of 4 ------End------

Label and Location Size: L: 2.0cm*W: 1.0cm Label and Location FCC ID : 2BCHS-CRDAMLWY

Shenzhen HTT Technology Co., Ltd. Report No.: HTT202409014 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 1 of 2 Product Name: String Lights Model No.: SL-SPLM-C EUT Constructional Details Internal Photo Report No.: HTT202202347 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 2 of 2 ------End------

RF Exposure evaluation FCC ID: 2BCHS-CRDAMLWY Exposure category: General population/uncontrolled environment EUT Type: Production Unit Device Type: Mobile Device 1. Reference According to §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to §1.1310 and §2.1091 RF exposure is calculated. KDB447498 D01: Mobile and Portable Devices RF Exposure Procedures and Equipment Authorization Policies 2. Limit Limits for Maximum Permissible Exposure (MPE)/Controlled Exposure Frequency Range(MHz) Electric Field Strength(V/m) Magnetic Field Strength(A/m) Power Density (mW/cm²) Averaging Time (minute) Limits for Occupational/Controlled Exposure 0.3 – 3.0 3.0 – 30 30 – 300 300 – 1500 1500 – 100,000 614 1842/f 61.4 / / 1.63 4.89/f 0.163 / / (100) * (900/f 2 )* 1.0 f/300 5 6 6 6 6 6 Limits for Maximum Permissible Exposure (MPE)/Uncontrolled Exposure Frequency Range(MHz) Electric Field Strength(V/m) Magnetic Field Strength(A/m) Power Density (mW/cm²) Averaging Time (minute) Limits for Occupational/Controlled Exposure 0.3 – 3.0 3.0 – 30 30 – 300 300 – 1500 1500 – 100,000 614 824/f 27.5 / / 1.63 2.19/f 0.073 / / (100) * (180/f 2 )* 0.2 f/1500 1.0 30 30 30 30 30 F=frequency in MHz *=Plane-wave equivalent power density 3. MPE Calculation Method Predication of MPE limit at a given distance Equation from page 18 of OET Bulletin 65, Edition 97-01 S=PG/4πR² Where: S=power density P=power input to antenna G=power gain of the antenna in the direction of interest relative to an isotropic radiator R=distance to the center of radiation of the antenna 4. Antenna Information SL-SPLM-C can only use antennas certificated as follows provided by manufacturer; Antenna No. Model No. of antenna: Type of antenna: Gain of the antenna (Max.) Frequency range: BLE / PCB antenna 0.00dBi for 2400-2500MHz; 5. Manufacturing Tolerance BLE GFSK(Peak) Channel Channel 00 Channel 19 Channel 39 Target (dBm) -4.0 -4.0 -6.0 Tolerance ±(dB) 1.0 1.0 1.0 6. Standalone MPE Result As declared by the Applicant, the EUT is a wireless device used in a fix application, at least 20 cm from any body part of the user or nearby persons; from the maximum EUT RF output power, the minimum separation distance, r =20cm, as well as the gain of the used antenna is 0.0dBi, the RF power density can be obtained. Modulation Type Output power Antenna Gain (dBi) Antenna Gain (linear) MPE (mW/cm 2 ) MPE Limits (mW/cm 2 ) dBm mW BLE -3.0 0.5012 0.0 1.000 0.0001 1.0000 Remark: 1. Output power (Peak) including turn-up tolerance; 2. MPE evaluate distance is 20cm from user manual provide by manufacturer. 7. Conclusion The measurement results comply with the FCC Limit per 47 CFR 2.1091 for the uncontrolled RF Exposure of mobile device. ----------------THE END OF REPORT---------------

Antennaspecification APPlications ※BluetoothHomeRF ※ISMband2.4GHzapplications 1.Dimensions 2.Specifications numberItemSpecifications 1WorkingCentralFrequency2441MHz 2BandWidth(2402-2480)MHz 3Gain0dBi 4VSWR≤2.0 5AntennatypePCBantenna 6AzimuthBeamwidthOmni‐directional 7Impedance50ohm 8ModulationmodeGFSK ‣CompanyName : ‣ Companyaddres shenzhenchaorendakejiyouxianghongsi s : Haiwailianyi Building 1303-1180 Yingchun Road 12th, Nanhu Street Jiabei Community, Luohu District, Shenzhen, Guangdong, China 518000 3.simulationparameter ①VSWR Mkr1:2397MHz1.47Mkr2:2450MHz1.51Mkr3:2482MHz1.59 ②SmithChar Mkr1:2397MHz73.4Mkr2:2450MHz62.7Mkr3:2482MHz66.8 ③ReturnLoss Mkr1:2397MHz-15Mkr2:2450MHz-18Mkr3:2482MHz-16 ④SmithChar Mkr1:2400MHz1.234Mkr2:2500MHz1.051Mkr3:2600MHz1.322 ⑤ReturnLoss Mkr1:2400MHz-19.59Mkr2:2450MHz-27.70Mkr3:2500MHz-31.97Mkr4: 2550MHz-21.83 ` ⑥Phase Mkr1:2400MHz-54.89Mkr2:2500MHz-82.03Mkr3:2600MHz-102.6 4.RadiationPattems XY-plane XZ-plane YZ-plane  3DRadiationpattern

Shenzhen HTT Technology Co., Ltd. Report No.: HTT202409014F01 This results shown in this test report refer only to the sample(s) tested, this test report cannot be reproduced, except in full, without prior written permission of the company. The report would be invalid without specific stamp of test institute and the signatures of compiler and approver. Page 1 of 30 TEST Report Applicant: shenzhenshichaorendakejiyouxiangongsi Address of Applicant: Haiwailianyi Building 1303-1180 Yingchun Road 12th, Nanhu Street Jiabei Community, Luohu District, Shenzhen, Guangdong, China 518000 Manufacturer : shenzhenchaorendakejiyouxianghongsi Address of Manufacturer : Haiwailianyi Building 1303-1180 Yingchun Road 12th, Nanhu Street Jiabei Community, Luohu District, Shenzhen, Guangdong, China 518000 Equipment Under Test (EUT) Product Name: String Lights Model No.: SL-SPLM-C Series model: SL-SPLM-WW, SL-SPLM-CW, SL-SPLM-RGB, SL-SPLM-B, APP-SL-B, APP-SL-C, APP-SL-RGB, APP-SL-CW, APP-SL-WW, SL-BLM-C, SL-BLM-WW, SL-BLM-CW, SL-BLM-RGB, SL-BLM-B, APPC-SPLM1*1-C, APPC-SPLM1.5*1-C, APPC-SPLM2*2-C, APPC-SPLM3*3-C, CTree-RCTrans, CTree-RCGreen, CTree-AppRCGreen, CTree-AppRCTrans, CTLeaf-AppRCGreen Trade Mark: N/A FCC ID: 2BCHS-CRDAMLWY Applicable standards: FCC CFR Title 47 Part 15 Subpart C Section 15.247 Date of sample receipt: Aug. 28, 2024 Date of Test: Aug. 28, 2024 ~ Sep. 03, 2024 Date of report issued: Sep. 03, 2024 Test Result : PASS * * In the configuration tested, the EUT complied with the standards specified above. Report No.: HTT202409014F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 2 of 30 1. Version Version No. Date Description 00 Sep. 03, 2024 Original Tested/ Prepared By Date: Sep. 03, 2024 Project Engineer Check By: Date: Sep. 03, 2024 Reviewer Approved By : Date: Sep. 03, 2024 Authorized Signature Report No.: HTT202409014F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 3 of 30 2. Contents Page 1. VERSION ........................................................................................................................................................ 2 2. CONTENTS .................................................................................................................................................... 3 3. TEST SUMMARY ........................................................................................................................................... 4 4. GENERAL INFORMATION ............................................................................................................................ 5 4.1. GENERAL DESCRIPTION OF EUT ................................................................................................................ 5 4.2. TEST MODE ............................................................................................................................................... 7 4.3. DESCRIPTION OF SUPPORT UNITS .............................................................................................................. 7 4.4. DEVIATION FROM STANDARDS .................................................................................................................... 7 4.5. ABNORMALITIES FROM STANDARD CONDITIONS ........................................................................................... 7 4.6. TEST FACILITY ........................................................................................................................................... 7 4.7. TEST LOCATION ......................................................................................................................................... 7 4.8. ADDITIONAL INSTRUCTIONS ........................................................................................................................ 7 5. TEST INSTRUMENTS LIST ........................................................................................................................... 8 6. TEST RESULTS AND MEASUREMENT DATA ........................................................................................... 9 6.1. CONDUCTED EMISSIONS ............................................................................................................................ 9 6.2. CONDUCTED OUTPUT POWER .................................................................................................................. 12 6.3. CHANNEL BANDWIDTH .............................................................................................................................. 13 6.4. POWER SPECTRAL DENSITY ..................................................................................................................... 15 6.5. BAND EDGES ........................................................................................................................................... 17 6.5.1 Conducted Emission Method .......................................................................................................... 17 6.5.2 Radiated Emission Method ............................................................................................................. 18 6.6. SPURIOUS EMISSION ................................................................................................................................ 20 6.6.1 Conducted Emission Method .......................................................................................................... 20 6.6.2 Radiated Emission Method ............................................................................................................. 22 6.7. ANTENNA REQUIREMENT .......................................................…

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Shenzhen HTT Technology Co., Ltd. Report No.: HTT202409014 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 1 of 2 Product Name: String Lights Model No.: SL-SPLM-C Test Setup Photo Radiated Emission Report No.: HTT202409014 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 2 of 2 Conducted Emission ------End------