2A38HSB4200Studebaker AI Hearing System

E-1 WARNING TO PREVENT FIRE OR SHOCK HAZARD, DO NOT USE THIS PLUG WITH AN EXTENSION CORD, RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE. TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. The Rating plate is located at the bottom enclosure of the apparatus. IMPORTANT SAFETY INSTRUCTIONS 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water. 6. Clean only with dry cloth. 7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions. 8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that product heat. 9. AC adaptor is used as disconnect device and it should remain readily operable during intended use. To disconnect the apparatus from the mains completely, the AC adaptor should be disconnected from the mains socket outlet completely. 10. Only use attachments/accessories specified by the manufacturer. 11. Unplug this apparatus during lightning storms or when unused for a long period of time. 12. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped. 13. This appliance shall not be exposed to dripping or splashing water and that no object filled with liquids such as vases shall be placed on the apparatus. 14. Do not overload wall outlet. Use only power source as indicated. 15. Use replacement part as specified by the manufacturer. 16. Upon completion of any service or repairs to this product, ask the service technician to perform safety checks. E-2 17.Power Sources - This product should be operated only from the type of power source indicated on the marking label. If you are not sure of the type of power supply to your home, consult your product dealer or local power company. For products intended to operate from battery power, or other sources, refer to the operating instruction. 18.Object and Liquid Entry - Never push objects of any kind into this product through openings as they may touch dangerous voltage points or short-out parts that could result in a fire or electric shock. Never spill liquid of any kind on the product. 19.Damage Requiring Service - Unplug this product from the wall outlet and refer servicing to qualified service personnel under the following conditions: a)When the power-supply cord or plug is damaged, b)If liquid has been spilled, or objects have fallen into the product, c)If the product has been exposed to rain or water, d)If the product does not operate normally by following the operating instructions. Adjust only those controls that are covered by the operating instructions as an improper adjustment of other controls may result in damage and will often require extensive work by a qualified technician to restore the product to its normal operation. e)If the product has been dropped or damaged in any way, and f) When the product exhibits a distinct change in performance - this indicates a need for service. 20.The battery shall not be exposed to excessive heat such as sunshine, fire or the like. 21.Minimum distances of 4 inches around the apparatus for sufficient ventilation. 22.The ventilation should not be impeded by covering the ventilation openings with items, such as newspapers, tablecloths, curtains, etc. 23.No open flame sources, such as lit candles, should be placed on the product. 24.The use of apparatus in moderate climates is advised. 25.Attention should be drawn to the environmental aspects of battery disposal. 26. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. SAVE THESE INSTRUCTIONS E-3 COMPLIANCE WITH FCC REGULATIONS FCC ID: 2A38HSB4200 This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: - Reorient or relocate the receiving antenna. - Increase the separation between the equipment and receiver. - Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. - Consult the dealer or an experienced radio/TV technician for help. CAUTIO N: Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. PROTECT YOUR FURNITURE!! This system is equipped with non-skid rubber ‘feet’ to prevent the product from moving when you operate the controls. These ‘feet’ are made from non-migrating rubber material specially formulated to avoid leaving any marks or stains on your furniture. However certain types of oil based furniture polishes, wood preservatives, or cleaning sprays may cause the rubber ‘feet’ …

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Rev 1/26/2023 Jenmart Industrial (HK) Co., Limited Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2025-11-21 FCC ID: 2A38HSB4200 Ref. #1: Attestation Statements Part 2.911(d)(5)(i) Filing Jenmart Industrial (HK) Co., Limited 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. Jenmart Industrial (HK) Co., Limited certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end-user or third parties cannot install additional software on this device. Ref. #2: Attestation Statements Part 2.911(d)(5)(ii) Filing Jenmart Industrial (HK) Co., Limited certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. pplicant: Jenmart Industrial (HK) Co., Limited Address: Units A&B, 15/F, Neich Tower, 128 Gloucester Road, Wanchai, Hong Kong Contact Person: Blake Li Tel.: +86-769 28633568 Email: [email protected] Sincerely, Signature:

Attestation Statements Date: 2025-11-21 TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA RE: Attestation Statements Part 2.911(d)(7) request for(FCC ID: 2A38HSB4200) Jenmart Industrial (HK) Co., Limited, the undersigned, hereby authorize HOPEK CORPORATION INC to act as our designated agent for service of process, Jenmart Industrial (HK) Co., Limited 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 the equipment. HOPEK CORPORATION INC accepts the responsibility to act as designated agent for service of process. Applicant Information： Company name: Jenmart Industrial (HK) Co., Limited Contact Name: Blake Li Address: Units A&B, 15/F, Neich Tower, 128 Gloucester Road, Wanchai, Hong Kong Telephone No: +86-769 28633568 Email: [email protected] FRN: 0031825169 Signature: Blake Li Agent Information: Company Name: HOPEK CORPORATION INC Address:16755 Coyote Bush Dr Unit 84, San Diego, CA 92127 United States FRN: 0034562900 Contact Name: Peter Davis Telephone No: 561-235-6113 Email: [email protected] Signature: Peter Davis

2.4GHz2012Chi p Antenna:RANT2012F245C07 Dimension(mm) L2.05+-0.10 W1.20+-0.10 T0.65+-0.10 No.TerminalName 1Feeding/GNG 2GND Application: WLAN,802.11b/g,Bluetooth,WLAN,etc... Features SMD,highreliability,ultraImpact,Omni-directional... PartnumberInformation RANT2012F245C07 (A)(B)(C)(D)(E)(F) (A)ProductTypeChipAntenna (B)SizeCode2.0x1.2mm(+-0.2mm) (C)MaterialHighKmaterial (D)Frequency2.4~2.5GHz (E)FeedingmodePIFA&SingleFeeding (F)AntennatypeType=07 ElectricalSpecification WorkingFrequencyRange2400~2484MHz Bandwidth84(Min.) PeakGain1.7dBi(Typ.) Impedance50Ohm Returnloss10dB(Min) PolarizationLinear AzimuthBeamwidthOmni-directional OperationTemperature( °C )-40~85 °C ResistancetoSolderingHeats 10sec.(@280°C) TerminationNi/Au(Leadless) ThespecificationisdefinedonEVB. DimensionandTerminalConfiguration 咏成國際科技有限公司電話:13530576606 RAINInternationalTechnologyCo.,Ltd. 7 / F, Building F, Zhichuang Park, Tong 'an, Gushu, Shenzhen 2.4GHz2012ChipAntenna:RANT2012F245C07 EvaluationBoardReference PCBDimensionAntennaLayoutReferenceUnit:mm ElectricalCharacteristics ReturnLoss ReturnLoss&Radiation 1 Frequency(MHz) S11(dB) 2400-10.77 2450-24.81 2484-10.243 Radiation Z Y X 2400MHz2450MHz2500MHz Efficiency70.56%75.25%71.01% 2.4GHz2012ChipAntenna:RANT2012F245C07 TapingSpecifications ReelandTapingSpecification ReelSpecification TYPESIZEABCD 20127”5K/Reel 9.0±0.5 60±213.5±0.5178±2 TappingSpecification PackagingTypeABWEFGHTDP PaperType2012 1.50±0.202.30±0.208.0±0.201.75±0.103.5±0.054.0±0.102.0±0.050.75±0.101.57±0.104.0±0.1 2.4GHz2012ChipAntenna:RANT2012F245C07 ReliabilityTable TestItemProcedure Requirements CeramicType Remark (Reference) Electrical Characterization Fulfilltheelectrical specification UserSpec. Thermal Shock 1.Preconditioning: 50±10°C/1hr,thenkeepfor24±1hrsatroomtemp. 2.Initialmeasure:Spec:referInitialspec. 3.Rapidchangeoftemperaturetest: -30°Cto+85°C;100cycles; 15minutesatLowercategorytemperature; 15minutesatUppercategorytemperature. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 107 Temperature Cycling 1.Initialmeasure:Spec:referInitialspec. 2.100Cycles(-30°Cto+85°C),SoakMode=1(2Cycle/hours). 3.Measurementat24±2Hoursaftertestcondition. NoVisibleDamage. Fulfilltheelectrical specification. JESD22 JA104 HighTemperature Exposure 1.Initialmeasure:Spec:referInitialspec. 2.Unpowered;500hours@T=+85°C. 3.Measurementat24±2hoursaftertest. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 108 LowTemperature Storage 1.Initialmeasure:Spec:referInitialspec. 2.Unpowered:500hours@T=-30°C. 3.Measurementat24±2hoursaftertest. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 108 Solderability (SMDBottomSide) Dippingmethod: a.Temperature:235±5°C b.Dippingtime:3±0.5s Thesoldershouldcover over95%ofthecritical areaofbottomside. IEC60384-21/22 4.10 SolderingHeat Resistance (RSH) Preheatingtemperature:150±10°C. Preheatingtime:1~2min. Soldertemperature:260±5°C. Dippingtime:5±0.5s NoVisibleDamage.IEC60384-21/22 4.10 Vibration5g'sfor20min.,12cycleseachof3orientations Note:Use8"X5"PCB.031"thick7securepointson,onelong sideand2securepointsatcornersofoppositesides.Parts mountedwithin2"fromanysecurepoint.Testfrom10-2000 Hz. NoVisibleDamage.MIL-STD-202 Method204 Mechanical Shock Threeshocksineachdirectionshallbeappliedalongthethree mutuallyperpendicularaxesofthetestspecimen(18shocks) Peakvalue:1,500g’s Duration:0.5ms Velocitychange:15.4ft/s Waveform:Half-sine NoVisibleDamage.MIL-STD-202 Method213 Humidity Bias 1.Humidity:85%R.H.,Temperature:85±2°C. 2.Time:500±24hours. 3.Measurementat24±2hrsaftertestcondition. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 Method106 2.4GHz2012ChipAntenna:RANT2012F245C07 2.4GHz2012ChipAntenna:RANT2012F245C07 _ Board Flex (SMD) 1.Mountingmethod: IR-Reflow.PCBSize(L:100×W:40×T:1.6mm) 2.Applytheloadindirectionofthearrowuntilbendingreaches 2mm. NoVisibleDamage.AEC-Q200 005 AdhesionForceof1.8Kgfor60seconds.NoVisibleDamage Magnificationof20Xor greatermaybeemployed forinspectionofthe mechanicalintegrityofthe devicebodyterminalsand body/terminaljunction. AEC-Q200 006 Physical Dimension Anyapplicablemethodusingx10magnification,micrometers, calipers,gauges,contourprojectors,orothermeasuring equipment,capableofdeterminingtheactualspecimen dimensions. Inaccordancewith specification. JESD22 JB100 RevisionHistory RevisionDateContent 12020/10/15NewDatasheet

Jenmart Industrial (HK) Co., Limited Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: December 11, 2025 Subject; Request for Confidentiality FCC ID: 2A38HSB4200 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Blake Li Title: Wanchai

Effective Date: April 2, 2020 QSF 7.6.4-8 – Agent Authorization Letter Template Page 1 of 1 Revision Date: Revision: 0 Jenmart Industrial (HK) Co., Limited Date：2025-11-21 Product Model Number: SB4200, SB4200XXXXX (Where XXXXX denote any printable characters in the ASCII Standard Character Table to represent variances in cosmetics or buyers) FCC ID：2A38HSB4200 To whom it may concern, Re: Product Certification Representative Authorization Letter We authorize QAI Laboratories Ltd. 3980 North Fraser Way, Burnaby B.C. Canada V5J 5K5 to act on our behalf on all matters concerning the above named equipment. This shall include the following: • Testing • Approval applications and procedures We declare that QAI Laboratories Ltd. is allowed to forward all information related to the approval project to the applied certification body and to the notification entities and to discuss any issues concerning the approval application. Any and all acts carried out by QAI Laboratories Ltd. on our behalf shall have the same effect as acts of our own. Signature: By: Blake Li Contact Listed on FCC Wesbite Title: Wanchai Email: [email protected] On behalf of: Jenmart Industrial (HK) Co., Limited

Jenmart Industrial (HK) Co., Limited Declaration Letter of Model Difference Date: 2025-11-21 FCC ID: 2A38HSB4200 Tested Model Number: SB4200 Adding Model Number(s): SB4200XXXXX (Where XXXXX denote any printable characters in the ASCII Standard Character Table to represent variances in cosmetics or buyers) All Adding Model Number(s) is/are same electrically identical as Tested Model Number. Only the model and color are different. Yours Sincerely, Applicant: Jenmart Industrial (HK) Co., Limited Address: Units A&B, 15/F, Neich Tower, 128 Gloucester Road, Wanchai, Hong Kong Contact Person: Blake Li Tel.: +86-769 28633568 Email: [email protected] Sincerely, Signature:

Page 1 of 6 Report No.: LGT25K076 Appendix - External Photographs of EUT Constructional Details Photo 1 Photo 2 Page 2 of 6 Report No.: LGT25K076 Appendix - External Photographs of EUT Constructional Details Photo 3 Photo 4 Page 3 of 6 Report No.: LGT25K076 Appendix - External Photographs of EUT Constructional Details Photo 5 Photo 6 Page 4 of 6 Report No.: LGT25K076 Appendix - External Photographs of EUT Constructional Details Photo 7 Photo 8 Page 5 of 6 Report No.: LGT25K076 Appendix - External Photographs of EUT Constructional Details Photo 9 Photo 10 Page 6 of 6 Report No.: LGT25K076 Appendix - External Photographs of EUT Constructional Details Photo 11 Photo 12

Label Size: 15*10mm Model Name: SB4200 FCC ID: 2A38HSB4200

Page 1 of 6 Report No.: LGT25K076 Appendix - Internal Photographs of EUT Constructional Details Photo 1 Photo 2 Page 2 of 6 Report No.: LGT25K076 Appendix - Internal Photographs of EUT Constructional Details Photo 3 Photo 4 BT ANT Page 3 of 6 Report No.: LGT25K076 Appendix - Internal Photographs of EUT Constructional Details Photo 5 Photo 6 Page 4 of 6 Report No.: LGT25K076 Appendix - Internal Photographs of EUT Constructional Details Photo 7 Photo 8 Page 5 of 6 Report No.: LGT25K076 Appendix - Internal Photographs of EUT Constructional Details Photo 9 Photo 10 BT ANT Page 6 of 6 Report No.: LGT25K076 Appendix - Internal Photographs of EUT Constructional Details Photo 11 Photo 12

The test report is effective only with both signature and specialized stamp. This report shall not be reproduced except in full without the written approval of the Laboratory. The results in this report only apply to the tested sample. Shenzhen LGT Test Service Co., Ltd. Tel: 0755-89668180 E-mail:[email protected] Web: www.lgt-cert.com Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China Page 1 of 8 EMF TEST REPORT Product Name: Studebaker AI Hearing System Model Number: SB4200, SB4200XXXXX (Where XXXXX denote any printable characters in the ASCII Standard Character Table to represent variances in cosmetics or buyers) FCC ID: 2A38HSB4200 Issued For : Jenmart Industrial (HK) Co., Limited Units A&B, 15/F, Neich Tower, 128 Gloucester Road, Wanchai, Hong Kong Issued By : Shenzhen LGT Test Service Co., Ltd. Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China Report Number: LGT25K076HA01 Sample Received Date: Nov. 12, 2025 Date of Test: Nov. 12, 2025 ~ Nov. 18, 2025 Date of Issue: Nov. 18, 2025 Report No.: LGT25K076HA01 Page 2 of 8 TEST REPORT CERTIFICATION Applicant: Jenmart Industrial (HK) Co., Limited Address: Units A&B, 15/F, Neich Tower, 128 Gloucester Road, Wanchai, Hong Kong Manufacturer: DONGGUAN UIISII ELECTRONICS CO., LTD Address: NO 8 ,HENGXING ROAD,HENGKENG INDUSTRIAL PARK, LIAOBU TOWN,DONGGUAN CITY,GUANGDONG PROVINCE, CHINA Product Name: Studebaker AI Hearing System Trademark: Studebaker Model Number: SB4200, SB4200XXXXX (Where XXXXX denote any printable characters in the ASCII Standard Character Table to represent variances in cosmetics or buyers) Sample Status: Normal APPLICABLE STANDARDS STANDARD TEST RESULTS FCC 47 CFR §2.1093 KDB 447498 D01 General RF Exposure Guidance v06 PASS Prepared by: Approved by: Zane Shan Vita Li Engineer Technical Director Report No.: LGT25K076HA01 Page 3 of 8 TABLE OF CONTENTS 1 . GENERAL INFORMATION 5 1.1 GENERAL DESCRIPTION OF THE EUT 5 1.2 TEST LABORATORY 5 2 . FCC 47CFR §2.1093 REQUIREMENT 6 2.1 TEST STANDARDS 6 2.2 LIMIT 6 2.3 TEST RESULT 8 Report No.: LGT25K076HA01 Page 4 of 8 Revision History Rev. Issue Date Revisions 00 Nov. 18, 2025 Initial Issue Report No.: LGT25K076HA01 Page 5 of 8 1. GENERAL INFORMATION 1.1 GENERAL DESCRIPTION OF THE EUT Product Name: Studebaker AI Hearing System Test Model Number: SB4200 Series Number: SB4200XXXXX (Where XXXXX denote any printable characters in the ASCII Standard Character Table to represent variances in cosmetics or buyers) Model Difference: Only the model and color are different. Frequency Bands: Bluetooth 2402-2480MHz Rating: Input: DC5V Hardware Version: V1.0 Software Version: V1.0 1.2 TEST LABORATORY Company Name: Shenzhen LGT Test Service Co., Ltd. Address: Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China Accreditation Certificate: FCC Registration No.: 746540 CAB ID: CN0136 Report No.: LGT25K076HA01 Page 6 of 8 2. FCC 47CFR §2.1093 REQUIREMENT 2.1 TEST STANDARDS The limit for Maximum Permissible Exposure (MPE) specified in KDB 447498 D01 General RF Exposure Guidance v06 is followed. The gain of the antennas used in the product is extracted from the Antenna data sheets provided and also the maximum total power input to the antenna is measured. Through the Friis transmission formula and the maximum gain of the antenna, we can calculate the distance, away from the product, where the limit of MPE is reached. Although the Friis Transmission formula is far field assumption, the calculated result of that is an over-prediction for near field power density. It is taken as worst case to specify the safety range. 2.2 LIMIT Approximate SAR Test Exclusion Power Thresholds at Selected Frequencies and Test Separation Distances are illustrated in the following Table. Report No.: LGT25K076HA01 Page 7 of 8 The 1-g 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 The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. Report No.: LGT25K076HA01 Page 8 of 8 2.3 TEST RESULT Turn up Result Mode Turn up Power BT-GFSK -1±1dBm BT-π/4-DQPSK 1.5±1dBm BT-8DPSK 1.5±1dBm The MPE result of worst mode: RF Function Frequency (MHz) Max Turn up Power (dBm) Max Turn up Power (mW) Estimated SAR Limit Ratio Result BT 2441 2.50 1.78 0.556 3 0.185 Pass Note: The Maximum Power Density is less than the limit, complies with the exemption requirements. ※※※※※END OF THE REPORT※※※※※

The test report is effective only with both signature and specialized stamp. This report shall not be reproduced except in full without the written approval of the Laboratory. The results in this report only apply to the tested sample. Shenzhen LGT Test Service Co., Ltd. Tel: 0755-89668180 E-mail:[email protected] Web: www.lgt-cert.com Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China Page 1 of 74 RF TEST REPORT Product Name: Studebaker AI Hearing System Model Number: SB4200, SB4200XXXXX (Where XXXXX denote any printable characters in the ASCII Standard Character Table to represent variances in cosmetics or buyers) FCC ID: 2A38HSB4200 Issued For : Jenmart Industrial (HK) Co., Limited Units A&B, 15/F, Neich Tower, 128 Gloucester Road, Wanchai, Hong Kong Issued By : Shenzhen LGT Test Service Co., Ltd. Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China Report Number: LGT25K076RF01 Sample Received Date: Nov. 12, 2025 Date of Test: Nov. 12, 2025 ~ Nov. 18, 2025 Date of Issue: Nov. 18, 2025 Report No.: LGT25K076RF01 Page 2 of 74 TEST REPORT CERTIFICATION Applicant: Jenmart Industrial (HK) Co., Limited Address: Units A&B, 15/F, Neich Tower, 128 Gloucester Road, Wanchai, Hong Kong Manufacturer: DONGGUAN UIISII ELECTRONICS CO., LTD Address: NO 8 ,HENGXING ROAD,HENGKENG INDUSTRIAL PARK, LIAOBU TOWN,DONGGUAN CITY,GUANGDONG PROVINCE, CHINA Product Name: Studebaker AI Hearing System Trademark: Studebaker Model Number: SB4200, SB4200XXXXX (Where XXXXX denote any printable characters in the ASCII Standard Character Table to represent variances in cosmetics or buyers) Sample Status: Normal APPLICABLE STANDARDS STANDARD TEST RESULTS FCC Part 15.247, Subpart C ANSI C63.10-2020 PASS Prepared by: Approved by: Zane Shan Vita Li Engineer Technical Director Report No.: LGT25K076RF01 Page 3 of 74 Table of Contents Page 1. SUMMARY OF TEST RESULTS 6 1.1 TEST LABORATORY 7 1.2 MEASUREMENT UNCERTAINTY 7 2. GENERAL INFORMATION 8 2.1 GENERAL DESCRIPTION OF THE EUT 8 2.2 DESCRIPTION OF THE TEST MODES 10 2.3 FREQUENCY HOPPING SYSTEM REQUIREMENTS 10 2.4 TABLE OF PARAMETERS OF TEST SOFTWARE SETTING 12 2.5 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 12 2.6 EQUIPMENTS LIST 13 3. EMC EMISSION TEST 15 3.1 CONDUCTED EMISSION MEASUREMENT 15 3.2 RADIATED EMISSION MEASUREMENT 19 4. CONDUCTED SPURIOUS & BAND EDGE EMISSION 30 4.1 LIMIT 30 4.2 TEST PROCEDURE 30 4.3 TEST SETUP 30 4.4 EUT OPERATION CONDITIONS 31 4.5 TEST RESULTS 31 5. NUMBER OF HOPPING CHANNEL 32 5.1 LIMIT 32 5.2 TEST PROCEDURE 32 5.3 TEST SETUP 32 5.4 EUT OPERATION CONDITIONS 32 5.5 TEST RESULTS 32 6. AVERAGE TIME OF OCCUPANCY 33 6.1 LIMIT 33 6.2 TEST PROCEDURE 33 6.3 TEST SETUP 33 6.4 EUT OPERATION CONDITIONS 33 6.5 TEST RESULTS 33 7. HOPPING CHANNEL SEPARATION MEASUREMEN 34 7.1 LIMIT 34 7.2 TEST PROCEDURE 34 Report No.: LGT25K076RF01 Page 4 of 74 7.3 TEST SETUP 34 7.4 EUT OPERATION CONDITIONS 34 7.5 TEST RESULTS 34 8. BANDWIDTH TEST 35 8.1 LIMIT 35 8.2 TEST PROCEDURE 35 8.3 TEST SETUP 35 8.4 EUT OPERATION CONDITIONS 35 8.5 TEST RESULTS 35 9. OUTPUT POWER TEST 36 9.1 LIMIT 36 9.2 TEST PROCEDURE 36 9.3 TEST SETUP 36 9.4 EUT OPERATION CONDITIONS 36 9.5 TEST RESULTS 36 10. ANTENNA REQUIREMENT 37 10.1 STANDARD REQUIREMENT 37 10.2 EUT ANTENNA 37 APPENDIX I - TEST RESULTS 38 1. DUTY CYCLE 38 2. BANDWIDTH 42 3. MAXIMUM CONDUCTED OUTPUT POWER 49 4. CARRIER FREQUENCY SEPARATION 53 5. NUMBER OF HOPPING FREQUENCIES 55 6. TIME OF OCCUPANCY (DWELL TIME) 57 7. UNWANTED EMISSIONS IN NON-RESTRICTED FREQUENCY BANDS 60 APPENDIX II - MEASUREMENT PHOTOS 74 Report No.: LGT25K076RF01 Page 5 of 74 Revision History Rev. Issue Date Revisions 00 Nov. 18, 2025 Initial Issue Report No.: LGT25K076RF01 Page 6 of 74 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: KDB 558074 D01 15.247 Meas Guidance v05r02. FCC Part 15.247, Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS -- 15.247(a)(1) Hopping Channel Separation PASS -- 15.247(a)(1)&(b)(1) Output Power PASS -- 15.209 Radiated Spurious Emission PASS -- 15.247(d) Conducted Spurious & Band Edge Emission PASS -- 15.247(a)(1)(iii) Number of Hopping Frequency PASS -- 15.247(a)(1)(iii) Dwell Time PASS -- 15.247(a)(1) Bandwidth PASS -- 15.205 Restricted bands of operation PASS -- Part 15.247(d)/part 15.209(a) Band Edge Emission PASS -- 15.203 Antenna Requirement PASS -- NOTE: (1) ‘N/A’ denotes test is not applicable in this Test Report. (2) All tests are according to ANSI C63.10-2020. Report No.: LGT25K076RF01 Page 7 of 74 1.1 TEST LABORATORY Company Name: Shenzhen LGT Test Service Co., Ltd. Address: Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China Accreditation Certificate: FCC Registration No.: 746540 CAB ID: CN0136 1.2 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ± U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2, providing a level of confidence of approximately 95 %. No. Item Uncertainty 1 Occupied Channel Bandwidth ±0.46% 2 RF Output Power, Conducted ±0.71dB 3 Power Spectral Density, Conducted ±1.57dB 4 Unwanted Emission, Conducted ±0.63dB 5 Conducted emission ±2.80dB 6 All Emissions, Radiated (0.009-30MHz) ±2.16dB 7 All Emissions, Radiated (30MHz-1GHz) ±4.61dB 8 All Emissions, Radiated (1GHz-18GHz) ±5.49dB 9 Temperature ±0.5∞C 10 Humidity ±2% 11 Duty Cycle ±2.3% Note: The measurement uncertainty is not included in the test result. Report No.: LGT25K076RF01 Page 8 of 74 2. GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF THE EUT Product Name: Studebaker AI Hearing System Test Model Number: SB4200 Series Number: SB4200XXXXX (Where XXXXX denote any printable characters in the ASCII Standard Chara…

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Page 1 of 2 Report No.: LGT25K076 Appendix - Test Setup photos Set-up for Radiated Spurious Emission, Below 1GHz Set-up for Radiated Spurious Emission, Above 1GHz Page 2 of 2 Report No.: LGT25K076 Set-up for Conducted Emission