2BGYL-SJ-0004Bluetooth Earbuds

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Shenzhen Longsheng Union Technology Co.,Ltd 2024.06.18 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for FCC ID: 2BGYL-SJ-0004 Shenzhen Longsheng Union Technology Co.,Ltd certifies that 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. Sincerely, Applicant signature: Applicant printed name: Judy Lin / Sales manager Shenzhen Longsheng Union Technology Co.,Ltd 2024.06.18 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for FCC ID: 2BGYL-SJ-0004 Shenzhen Longsheng Union Technology Co.,Ltd certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Sincerely, Applicant signature: Applicant printed name: Judy Lin / Sales manager

Shenzhen Longsheng Union Technology Co.,Ltd 2024.06.18 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR EUT NAME: Bluetooth Earbuds Trademark: SUNJOM MODEL: SJ-0004, SJ-0023, SJ-0024, SJ-0025, SJ-0026, SJ-0027, SJ-0028, SJ-0029, SJ-0030. FCC ID: 2BGYL-SJ-0004 To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the - Block Diagram - Schematics - Operational Description required to be submitted with this application be permanently withheld from public review. The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. Please contact me if there is any information you may need. Sincerely, Client’s signature: Client’s name / title: Judy Lin / Sales manager Contact information / address: Room 326, Fuyong Chamber of Commerce Information Building, 6348 Baoan Avenue, Baoan District, Shenzhen, Guangdong, China

Shenzhen Longsheng Union Technology Co.,Ltd 2024.06.18 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen BCTC Testing Co., Ltd to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Client’s signature: Client’s name / title: Judy Lin / Sales manager Contact information / address: Room 326, Fuyong Chamber of Commerce Information Building, 6348 Baoan Avenue, Baoan District, Shenzhen, Guangdong, China

Shenzhen Longsheng Union Technology Co.,Ltd Model Difference EUT NAME: Bluetooth Earbuds Trademark: SUNJOM MODEL: SJ-0004, SJ-0023, SJ-0024, SJ-0025, SJ-0026, SJ-0027, SJ-0028, SJ- 0029, SJ-0030. FCC ID: 2BGYL-SJ-0004 All the model are the same circuit and RF module, except model names and appearance of the color. Regards Sincerely Client’s signature: Client’s name / title: Judy Lin / Sales manager Contact information / address: Room 326, Fuyong Chamber of Commerce Information Building, 6348 Baoan Avenue, Baoan District, Shenzhen, Guangdong, China

External Photos R L

10*5mm Label Location FCC ID: 2BGYL-SJ-0004 Label Location

Internal Photos R Antenna L

FCC ID: 2BGYL-SJ-0004 Portable device According to §15.247(e)(i) and §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 KDB447498 D01 General RF Exposure Guidance V06 The 1-g SAR and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(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 When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. BT Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n SAR Exclusion threshold SAR test exclusion GFSK2.4803.422.203±14.002.51<50.791143.00YES π/ 4 DQPSK 2.4804.242.654±15.003.16<50.995993.00YES 8DPSK2.4804.752.994±15.003.16<50.995993.00YES BLE Modulation Channel Freq. (GHz) Conducte d power (dBm) Conducted power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculation SAR Exclusion threshold SAR test exclusion GFSK(1Mb ps) 2.440 2.38 1.73 2±1 3.00 2.00 <5 0.62334 3.00 YES GFSK(2Mb ps) 2.440 2.58 1.81 2±1 3.00 2.00 <5 0.62334 3.00 YES For the Max simultaneous transmission Conclusion: For the max result :1.61933＜3, the SAR testing is not required. Evaluation mode Result calculation Total Result calculation SAR Exclusion threshold Result BT 0.99599 1.61933 3.0 Pass BLE 0.62334

Antenna Test Report Customer华联智创 ProjectY91 Antenna RevisionA0 Prepared by15993920520 Checked by15993920520 Date2024.07.04 This report is to measure the performance of antenna for Y91 The antenna operating frequency at 2400-2500MHz, All test data are showed as below. Content 1. Test system 2. Product Overview &Dimension 3.OTA Data 3.TestResult Purpose Sequence Number Test Item equipment S parameter VSWR Agilent 5071C & Agilent 5071B OTA TestTRP&TIS Agilent8960 & CMW500 STIMO Gain & Efficiency Gain & Efficiency SATIMO Agilent 5071C 1.TestSystem 2.Product Overview & Dimension L&R 1.5N 3P 2012C06 3N 3.Test Result 3.1 Gain & Efficiency Frequency (MHz)Efficiency (%)Max GAIN (dBi) 240019.45-1.19 241018.07-1.57 242019.91-1.46 243020.28-1.04 244019.5-0.92 245023.07-0.57 246023.120.46 247022.44-0.47 248022.440.32 249026.61-0.16 250025.120.25 3.TestResult 3.2 2D Pattern 3.TestResult 3.2 2D Pattern 3.TestResult 3.2 2D Pattern 3.OTA Data Test Equipment：R&S CMW500 Test Condition：3D chamber BandChannelTRP(dBm)TIS(dBm) BTL 0 -1.97-80.07 39 -0.71-85.34 78 -0.49-84.13 BTR 0 -1.73-80.28 39 -1.21-85.82 78 -1.68-86.06 3.TestResult L-TRP 3.TestResult L-TIS 3.TestResult R-TRP 3.TestResult R-TIS

No.：BCTC/RF-EMC-005 Page: 1 of 54 Edition：B.2 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2405202970-2E Applicant: Shenzhen Longsheng Union Technology Co.,Ltd Product Name: Bluetooth Earbuds Test Model: SJ-0004 Tested Date: 2024-05-28 to 2024-06-06 Issued Date: 2024-06-17 Report No.: BCTC2405202970-2E No.：BCTC/RF-EMC-005 Page: 2 of 54 Edition：B.2 FCC ID: 2BGYL-SJ-0004 The test report is effective only with both signature and specialized stamp.This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen BCTC Testing Co., Ltd, this report can’t be reproduced except in full.The tested sample(s) and the sample information are provided by the client. Product Name: Bluetooth Earbuds Trademark: SUNJOM Model/Type Reference: SJ-0004 SJ-0023, SJ-0024, SJ-0025, SJ-0026, SJ-0027, SJ-0028, SJ-0029, SJ-0030. Prepared For: Shenzhen Longsheng Union Technology Co.,Ltd Address: Room 326, Fuyong Chamber of Commerce Information Building, 6348 Baoan Avenue, Baoan District, Shenzhen, Guangdong, China Manufacturer: Shenzhen Longsheng Union Technology Co.,Ltd Address: Room 326, Fuyong Chamber of Commerce Information Building, 6348 Baoan Avenue, Baoan District, Shenzhen, Guangdong, China Prepared By: Shenzhen BCTC Testing Co., Ltd. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Zhancheng, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: 2024-05-28 Sample Tested Date: 2024-05-28 to 2024-06-06 Issue Date: 2024-06-17 Report No.: BCTC2405202970-2E Test Standards: FCC Part15.247 ANSI C63.10-2013 Test Results: PASS Remark: This is Bluetooth BLE radio test report. Tested by: Approved by: Eric Yang/Project Handler Zero Zhou/Reviewer Report No.: BCTC2405202970-2E No.：BCTC/RF-EMC-005 Page: 3 of 54 Edition：B.2 Table Of Content Test Report Declaration Page 1. Version .................................................................................................................. 5 2. Test Summary ....................................................................................................... 6 3. Measurement Uncertainty ..................................................................................... 7 4. Product Information And Test Setup ..................................................................... 8 4.1 Product Information ............................................................................................... 8 4.2 Test Setup Configuration ...................................................................................... 9 4.3 Support Equipment ............................................................................................... 9 4.4 Channel List ........................................................................................................ 10 4.5 Test Mode ........................................................................................................... 10 4.6 Table of parameters of text software setting ....................................................... 10 5. Test Facility And Test Instrument Used ............................................................... 11 5.1 Test Facility ......................................................................................................... 11 5.2 Test Instrument Used .......................................................................................... 11 6. Conducted Emissions .......................................................................................... 13 6.1 Block Diagram Of Test Setup .............................................................................. 13 6.2 Limit .................................................................................................................... 13 6.3 Test procedure .................................................................................................... 13 6.4 EUT Operating Conditions .................................................................................. 13 6.5 Test Result .......................................................................................................... 14 7. Radiated Emissions ............................................................................................. 16 7.1 Block Diagram Of Test Setup .............................................................................. 16 7.2 Limit .................................................................................................................... 17 7.3 Test procedure .................................................................................................... 18 7.4 EUT operating Conditions ................................................................................... 19 7.5 Test Result .......................................................................................................... 19 8. Radiated Band Emission Measurement And Restricted Bands Of Operation ..... 24 8.1 Block Diagram Of Test Setup .............................................................................. 24 8.2 Limit .................................................................................................................... 24 8.3 Test Procedure ................................................................................................... 25 8.4 EUT Operating Conditions .................................................................................. 26 8.5 Test Result .......................................................................................................... 26 9. Power Spectral Density Test ............................................................................... 27 9.1 Block Diagram Of Test Setup .............................................................................. 27 9.2 Limit .................................................................................................................... 27 9.3 Test procedure ...................................................…

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Conducted emissions Radiated Measurement Photos