YHLBLUZ4M253Mobile Phone

1/1 US Agent for Service of Process LETTER OF ATTESTATION TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 US Agent for Service of Process: Company Name: BLU Products, Inc. FRN: 0019890946 Contact Name: Wei Zeng Address: 8600 NW 36th Street, Suite #200 Doral, FL 33166 Telephone No: 3057157171 Email: [email protected] Applicant: Company name: BLU Products, Inc. Product Description: Mobile Phone Grantee code: YHL FCC ID: YHLBLUZ4M253 Contact Name: Wei Zeng Address: 8600 NW 36th Street, Suite #200 Doral, FL 33166 Telephone No: 3057157171 Email: [email protected] [BLU Products, Inc.] certifies that, as of the date of this filing of the application with the TCB, [BLU Products, Inc.] is our designated US agent for service of process for the above referenced FCC ID. [BLU Products, Inc.] accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any commission related proceeding involving equipment. [BLU Products, Inc.] accepts, as of the date of the filing of the application, the obligation of the designated US agent for service of process for the above reference FCC ID. The US Agent for Service of Process is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. The Applicant is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. Date: 2023/04/14 Applicant’s Name: Wei Zeng US Agent’s Name: Wei Zeng Title: Senior Manager Title: Senior Manager Signature Signature

C5266091_X24_Ed.1 1/1 “Attestation Statements” TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 The Commission adopted rules that prohibit equipment authorization for “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List 1 , which is periodically updated. See the Covered List for more details. This Attestation Statement is to confirm that we follow the Section 2.911(d)(5)(i)-(ii) Applicant Company name: BLU Products, Inc. Grantee code: YHL FCC ID: YHLBLUZ4M253 Contact Name: Wei Zeng Address: 8600 NW 36th Street, Suite #200 Doral, FL 33166 Telephone No: 3057157171 Fax No: 3054368819 Email: [email protected] i. [BLU Products, Inc.] (“the applicant”) 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. The applicant must sign this certification. ii. [BLU Products, Inc.] (“the applicant”) 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. The applicant must sign this certification. Date: 2023/4/14 Applicant’s Name: BLU Products, Inc. Title: Senior Manager Signature 1 The Commission’s Covered List is published by the Public Safety and Homeland Security Bureau and posted on the Commission’s website. This Covered List, which is periodically updated, identifies particular equipment, produced by particular entities, that constitutes “covered” equipment. https://www.fcc.gov/supplychain/coveredlist

C5266091_X8_Ed.1 1/1 BLU Products, Inc. 8600 NW 36th Street, Suite #200 Doral, FL 33166 Letter of Authorization Company: BLU Products, Inc. Address: 8600 NW 36th Street, Suite #200 Doral, FL 33166 Product Name: Mobile Phone Model Number: Z4 MUSIC FCC Identifier: YHLBLUZ4M253 We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Wei Zeng Date: Apr. 14, 2023 Title: Senior Manager Signature of applicant:

C5266091_X10_Ed.1 1/1 BLU Products, Inc. 8600 NW 36th Street, Suite #200 Doral, FL 33166 Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: Apr. 14, 2023 Subject: Request for Confidentiality FCC ID: YHLBLUZ4M253 To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules (47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. Exhibits Long-Term Confidentiality Short-Term Confidentiality ID Label/Location No No Attestation Statement No No External Photos No Block Diagram Schematics Test Report No No Test Setup Photos No User’s Manual Internal Photos Parts List / Tune Up RF Exposure Info Operational Description Cover Letter(s) No No SDR Software / Security Info No Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Sincerely, Name: Wei Zeng Date: Apr. 14, 2023 Title: Senior Manager Signature of applicant:

Page 1 of 5 FCC ID: YHLBLUZ4M253 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com APPENDIX 2 PHOTOS OF EUT CONSTRUCTIONAL DETAILS EUT EXTERNAL PHOTOS EUT Photo EUT Photo Page 2 of 5 FCC ID: YHLBLUZ4M253 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com EUT Photo EUT Photo Page 3 of 5 FCC ID: YHLBLUZ4M253 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com EUT Photo EUT Photo Page 4 of 5 FCC ID: YHLBLUZ4M253 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com EUT Photo EUT Photo Page 5 of 5 FCC ID: YHLBLUZ4M253 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com EUT Photo EUT Photo

Label location

Page 1 of 5 FCC ID: YHLBLUZ4M253 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com APPENDIX 2 PHOTOS OF EUT CONSTRUCTIONAL DETAILS EUT INTERNAL PHOTOS EUT Photo EUT Photo Page 2 of 5 FCC ID: YHLBLUZ4M253 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com EUT Photo EUT Photo Page 3 of 5 FCC ID: YHLBLUZ4M253 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com EUT Photo EUT Photo GSM Antenna Page 4 of 5 FCC ID: YHLBLUZ4M253 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com EUT Photo EUT Photo BT Antenna Page 5 of 5 FCC ID: YHLBLUZ4M253 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com EUT Photo EUT Photo

Page 1 of 41 Report No.: 2303234527SAR-1 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] http://www.uttlab.com UTTR-SAR-IEEE Std 1528-2013-V1.1 FCC SAR TEST REPORT Product Name: Mobile Phone Trade Mark: BLU Model No.: Z4 MUSIC Report Number: 2303234527SAR-1 Test Standards: FCC 47 CFR Part 2 §2.1093 ANSI/IEEE C95.1-1992 IEEE Std 1528-2013 FCC ID: YHLBLUZ4M253 Test Result: PASS Date of Issue: April 20, 2023 Prepared for: BLU Products, Inc. 8600 NW 36th Street, Suite #200 Doral, FL 33166 Prepared by: Shenzhen UnionTrust Quality and Technology Co., Ltd. Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China TEL: +86-755-2823 0888 FAX: +86-755-2823 0886 Prepared by: Reviewed by: Curry Xue Henry Lu Test Engineer Team Leader Approved by: Date: April 20, 2023 Kevin Liang Assistant Manager Page 2 of 41 Report No.: 2303234527SAR-1 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] http://www.uttlab.com UTTR-SAR-IEEE Std 1528-2013-V1.1 Version Version No. Date Description V1.0 April 20, 2023 Original Report Page 3 of 41 Report No.: 2303234527SAR-1 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] http://www.uttlab.com UTTR-SAR-IEEE Std 1528-2013-V1.1 CONTENTS 1. GENERAL INFORMATION ....................................................................................................................................... 5 1.1. STATEMENT OF COMPLIANCE ................................................................................................................................. 5 1.2. CLIENT INFORMATION ............................................................................................................................................ 6 1.3. EUT INFORMATION ................................................................................................................................................ 6 1.3.1. GENERAL DESCRIPTION OF EUT .............................................................................................................. 6 1.3.2. DESCRIPTION OF ACCESSORIES ............................................................................................................... 6 1.3.3. EUT TX FREQUENCY BANDS .................................................................................................................... 6 1.3.4. WIRELESS TECHNOLOGIES....................................................................................................................... 7 1.4. MAXIMUM CONDUCTED POWER ............................................................................................................................. 7 1.5. OTHER INFORMATION ............................................................................................................................................ 7 1.6. TEST LOCATION .................................................................................................................................................... 7 1.7. TEST FACILITY ...................................................................................................................................................... 8 1.8. GUIDANCE STANDARD ........................................................................................................................................... 8 2. SPECIFIC ABSORPTION RATE (SAR) ................................................................................................................... 9 2.1. INTRODUCTION ...................................................................................................................................................... 9 2.2. SAR DEFINITION ................................................................................................................................................... 9 2.3. SAR LIMITS .......................................................................................................................................................... 9 3. SAR MEASUREMENT SYSTEM ............................................................................................................................ 10 3.1. SPEAG DASY SYSTEM ..................................................................................................................................... 10 3.1.1. ROBOT .................................................................................................................................................. 10 3.1.2. PROBE .................................................................................................................................................. 11 3.1.3. DATA ACQUISITION ELECTRONICS (DAE) ................................................................................................ 11 3.1.4. PHANTOM .............................................................................................................................................. 12 3.1.5. DEVICE HOLDER .................................................................................................................................... 13 3.1.6. SYSTEM VALIDATION DIPOLES ................................................................................................................ 13 3.2. SAR SCAN PROCEDURE ..................................................................................................................................... 14 3.2.1. SAR REFEREN…

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Test Laboratory: UnionTrust Date/Time: 2023/3/29 System Check_H835_10dBm DUT: Dipole 835 MHz Communication System: CW; Frequency: 835 MHz;Duty Cycle: 1:1 Medium: H835 Medium parameters used: f = 835 MHz; σ = 0.936 mho/m; ε r = 40.4; ρ = 1000 kg/m 3 DASY4 Configuration: - Probe: ES3DV3 - SN3090; ConvF(6.25, 6.25, 6.25); Calibrated: 2023/3/15 - Sensor-Surface: 3mm (Mechanical Surface Detection) - Electronics: DAE4 Sn662; Calibrated: 2023/3/8 - Phantom: SAM 1; Type: QD 000 P40 CB; Serial: TP/1378 - Postprocessing SW: SEMCAD, V1.8 Build 186 System check/Area Scan (51x81x1): Measurement grid: dx=15mm, dy=15mm Maximum value of SAR (interpolated) = 0.110 mW/g System check/Zoom Scan (5x5x7)/Cube 0: Measurement grid: dx=8mm, dy=8mm, dz=5mm Reference Value = 11.2 V/m; Power Drift = -0.008 dB Peak SAR (extrapolated) = 0.140 W/kg SAR(1 g) = 0.095 mW/g; SAR(10 g) = 0.064 mW/g Maximum value of SAR (measured) = 0.111 mW/g 0 dB = 0.111mW/g Test Laboratory: UnionTrust Date/Time: 2023/3/29 System Check_H1900_10dBm DUT: Dipole 1900 MHz Communication System: CW; Frequency: 1900 MHz;Duty Cycle: 1:1 Medium: H1900 Medium parameters used: f = 1900 MHz; σ = 1.44 mho/m; ε r = 39.3; ρ = 1000 kg/m 3 DASY4 Configuration: - Probe: ES3DV3 - SN3090; ConvF(5.08, 5.08, 5.08); Calibrated: 2022/4/6 - Sensor-Surface: 3mm (Mechanical Surface Detection) - Electronics: DAE4 Sn662; Calibrated: 2022/3/24 - Phantom: SAM 1; Type: QD 000 P40 CB; Serial: TP/1378 - Postprocessing SW: SEMCAD, V1.8 Build 186 System check/Area Scan (51x81x1): Measurement grid: dx=15mm, dy=15mm Maximum value of SAR (interpolated) = 0.492 mW/g System check/Zoom Scan (5x5x7)/Cube 0: Measurement grid: dx=8mm, dy=8mm, dz=5mm Reference Value = 18.2 V/m; Power Drift = -0.021 dB Peak SAR (extrapolated) = 0.684 W/kg SAR(1 g) = 0.377 mW/g; SAR(10 g) = 0.201 mW/g Maximum value of SAR (measured) = 0.468 mW/g 0 dB = 0.468mW/g

Test Laboratory: UnionTrust Date/Time: 2023/3/29 GSM850_GSM_Left Cheek_251 DUT: EUT Communication System: GSM850; Frequency: 848.8 MHz;Duty Cycle: 1:8.3 Medium: H835 Medium parameters used: f = 849 MHz; σ = 0.945 mho/m; ε r = 40.3; ρ = 1000 kg/m 3 DASY4 Configuration: - Probe: ES3DV3 - SN3090; ConvF(6.25, 6.25, 6.25); Calibrated: 2023/3/15 - Sensor-Surface: 3mm (Mechanical Surface Detection) - Electronics: DAE4 Sn662; Calibrated: 2023/3/8 - Phantom: SAM 1; Type: QD 000 P40 CB; Serial: TP/1378 - Postprocessing SW: SEMCAD, V1.8 Build 186 Area Scan (61x91x1): Measurement grid: dx=15mm, dy=15mm Maximum value of SAR (interpolated) = 0.766 mW/g Zoom Scan (5x5x7)/Cube 0: Measurement grid: dx=8mm, dy=8mm, dz=5mm Reference Value = 7.93 V/m; Power Drift = -0.025 dB Peak SAR (extrapolated) = 0.952 W/kg SAR(1 g) = 0.662 mW/g; SAR(10 g) = 0.436 mW/g Maximum value of SAR (measured) = 0.765 mW/g 0 dB = 0.765mW/g Test Laboratory: UnionTrust Date/Time: 2023/3/29 GSM1900_GSM_Right Cheek_661 DUT: EUT Communication System: GSM1900; Frequency: 1880 MHz;Duty Cycle: 1:8.3 Medium: H1900 Medium parameters used: f = 1880 MHz; σ = 1.43 mho/m; ε r = 39.4; ρ = 1000 kg/m 3 DASY4 Configuration: - Probe: ES3DV3 - SN3090; ConvF(5.11, 5.11, 5.11); Calibrated: 2023/3/15 - Sensor-Surface: 3mm (Mechanical Surface Detection) - Electronics: DAE4 Sn662; Calibrated: 2023/3/8 - Phantom: SAM 1; Type: QD 000 P40 CB; Serial: TP/1378 - Postprocessing SW: SEMCAD, V1.8 Build 186 Area Scan (61x91x1): Measurement grid: dx=15mm, dy=15mm Maximum value of SAR (interpolated) = 1.10 mW/g Zoom Scan (5x5x7)/Cube 0: Measurement grid: dx=8mm, dy=8mm, dz=5mm Reference Value = 7.32 V/m; Power Drift = -0.077 dB Peak SAR (extrapolated) = 1.38 W/kg SAR(1 g) = 0.845 mW/g; SAR(10 g) = 0.490 mW/g Maximum value of SAR (measured) = 1.03 mW/g 0 dB = 1.03mW/g Test Laboratory: UnionTrust Date/Time: 2023/3/29 GSM850_GSM_Rear Face_10MM_251 DUT: EUT Communication System: GSM850; Frequency: 848.8 MHz;Duty Cycle: 1:8.3 Medium: H835 Medium parameters used: f = 849 MHz; σ = 0.945 mho/m; ε r = 40.3; ρ = 1000 kg/m 3 DASY4 Configuration: - Probe: ES3DV3 - SN3090; ConvF(6.25, 6.25, 6.25); Calibrated: 2023/3/15 - Sensor-Surface: 3mm (Mechanical Surface Detection) - Electronics: DAE4 Sn662; Calibrated: 2023/3/8 - Phantom: SAM 1; Type: QD 000 P40 CB; Serial: TP/1378 - Postprocessing SW: SEMCAD, V1.8 Build 186 Area Scan (51x71x1): Measurement grid: dx=15mm, dy=15mm Maximum value of SAR (interpolated) = 0.773 mW/g Zoom Scan (5x5x7)/Cube 0: Measurement grid: dx=8mm, dy=8mm, dz=5mm Reference Value = 29.2 V/m; Power Drift = -0.072 dB Peak SAR (extrapolated) = 0.947 W/kg SAR(1 g) = 0.685 mW/g; SAR(10 g) = 0.469 mW/g Maximum value of SAR (measured) = 0.784 mW/g 0 dB = 0.784mW/g Test Laboratory: UnionTrust Date/Time: 2023/3/29 GSM1900_GSM_Rear Face_10MM_512 DUT: EUT Communication System: GSM1900; Frequency: 1850.2 MHz;Duty Cycle: 1:8.3 Medium: H1900 Medium parameters used: f = 1850.2 MHz; σ = 1.42 mho/m; ε r = 39.5; ρ = 1000 kg/m 3 DASY4 Configuration: - Probe: ES3DV3 - SN3090; ConvF(5.11, 5.11, 5.11); Calibrated: 2023/3/15 - Sensor-Surface: 3mm (Mechanical Surface Detection) - Electronics: DAE4 Sn662; Calibrated: 2023/3/8 - Phantom: SAM 1; Type: QD 000 P40 CB; Serial: TP/1378 - Postprocessing SW: SEMCAD, V1.8 Build 186 Area Scan (51x71x1): Measurement grid: dx=15mm, dy=15mm Maximum value of SAR (interpolated) = 1.15 mW/g Zoom Scan (5x5x7)/Cube 0: Measurement grid: dx=8mm, dy=8mm, dz=5mm Reference Value = 16.0 V/m; Power Drift = -0.125 dB Peak SAR (extrapolated) = 1.53 W/kg SAR(1 g) = 0.935 mW/g; SAR(10 g) = 0.540 mW/g Maximum value of SAR (measured) = 1.12 mW/g 0 dB = 1.12mW/g

Report No.: 2303234527SAR-1 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com UTTR-SAR-IEEE Std 1528-2013-V1.1_Appendix D <Photographs of EUT> Refer to the EUT external photographs. <Antenna Location> The separation distance for antenna to edge: Antenna to edge (mm) overall diagonal display diagonal Left Side Right Side Top Side Bottom Side WWAN 118 46 0 0 90 0 BT 45 0 70 23 Report No.: 2303234527SAR-1 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com UTTR-SAR-IEEE Std 1528-2013-V1.1_Appendix D <Photographs of SAR Setup> Right Cheek Right Tilted Left Cheek Left Tilted Front Face of EUT with 1.0 cm Gap Rear Face of EUT with 1.0 cm Gap

Justification for Extended SAR Dipole Calibrations Dipole Date of Measurement Return Loss (dB) Delta (%) Impedance (ohm) Delta (ohm) Head 835MHz Apr 13, 2021 -26.8 -7.79 50.4 1.37 Apr 07, 2022 -24.7 51.8 Note: The return loss is <-20dB, within 20% of prior calibration; the impedance is within 5 ohm of prior calibration. Therefore the verification results meet the requirement of extended calibration. Justification for Extended SAR Dipole Calibrations Dipole Date of Measurement Return Loss (dB) Delta (%) Impedance (ohm) Delta (ohm) Head 835MHz Apr 13, 2021 -26.8 -6.42 50.4 -2.19 Apr 13, 2023 -25.1 48.2 Note: The return loss is <-20dB, within 20% of prior calibration; the impedance is within 5 ohm of prior calibration. Therefore the verification results meet the requirement of extended calibration. Justification for Extended SAR Dipole Calibrations Dipole Date of Measurement Return Loss (dB) Delta (%) Impedance (ohm) Delta (ohm) Head 1900MHz Apr 14, 2021 -24.3 -0.33 47.6 2.10 Apr 07, 2022 -24.2 49.7 Note: The return loss is <-20dB, within 20% of prior calibration; the impedance is within 5 ohm of prior calibration. Therefore the verification results meet the requirement of extended calibration. Justification for Extended SAR Dipole Calibrations Dipole Date of Measurement Return Loss (dB) Delta (%) Impedance (ohm) Delta (ohm) Head 1900MHz Apr 14, 2021 -24.3 1.07 47.6 3.48 Apr 13, 2023 -24.5 51.1 Note: The return loss is <-20dB, within 20% of prior calibration; the impedance is within 5 ohm of prior calibration. Therefore the verification results meet the requirement of extended calibration.

Antenna Specification Summary ITEM SPEC. Model Name A18289CG Frequency Range 2400-2500 MHz MAX. GAIN 2400:-1.61dBi 2450:-2.44dBi 2500:-3.57dBi Antenna Type Monopole Antenna Length 25±1 mm AFT tech Electronic Co., Ltd. (Shenzhen) Room 302, Building B , Gangshen innovation park ,Huaning road 40,DaLang, longhua , Shenzhen Unit：mm Antenna Gain：（dB) Max Antenna pattern (2400MHz):

Page 1 of 2 FCC ID: YHLBLUZ4M253 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com APPENDIX 1 PHOTOS OF TEST SETUP ERP EIRP Page 2 of 2 FCC ID: YHLBLUZ4M253 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com RF Conducted Test Setup