FCC ID: 2A88Y-V49-A Open wearable stereo

FCC Requirement Any changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the equipment. 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. Note: 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.

2.4GHz 3216 Chip Antenna: 3216F245M02 3216 Chip antenn a For Bluetooth / WLAN Applicationsd P/N:

RANT3216F245M02 Dimension (mm) 3.23 0.20 1.66 0.20 1.23 0.20 L W T

: 13530576606 RAIN International Technology Co., Ltd. 502, No.2 Makan South Road, Xili Town, Nanshan District,ShenzhenGuangdong, China TEL: 13530576606 1 10 2.4GHz 3216 Chip Antenna: 3216F245M02 Part Number Information RANT 3216 A B F C 245 M E D 02 F Product Series Dimension L x W Material A B C D Working Frequency E F Feeding mode Antenna type Antenna 3.2X1.6mm (+-0.2mm) High K material 2.4 ~ 2.5GHz Monopole & Single Feeding Type=02 1. Electrical Specification Part Number Central Frequency Bandwidth Return Loss Peak Gain Impedance Operating Temperature Maximum Power Specification RANT3216F245M02 2450 100 (Min.)

-6.5 (Max) 3 50

-40+85 4 MHz MHz dB dBi Ohm W sec. Resistance to Soldering Heats 10 ( @ 260) Polarization Azimuth Beamwidth Termination Linear Omni-directional Cu / Sn (Leadless) RAIN International Technology Co., Ltd.

: 13530576606 TEL: 13530576606 Remark : Bandwidth & Peak Gain was measured under evaluation board of next page 2 10 2.4GHz 3216 Chip Antenna: 3216F245M02 2. Recommended PCB Pattern Evaluation Board Dimension Unit : mm Suggested Matching Circuit RAIN International Technology Co., Ltd.

: 13530576606 TEL: 13530576606 3 10 2.4GHz 3216 Chip Antenna: 3216F245M02 Layout Dimensions in Clearance area(Size=5.2*5.0mm) 50 ohm transmission Line Matching Circuit FootPrint

(Unit : mm) RAIN International Technology Co., Ltd.

: 13530576606 TEL: 13530576606 4 10 2.4GHz 3216 Chip Antenna: 3216F245M02 3. Measurement Results Return Loss RAIN International Technology Co., Ltd.

: 13530576606 TEL: 13530576606 5 10 2.4GHz 3216 Chip Antenna: 3216F245M02 Radiation Pattern Y X Z Efficiency 2400MHz 55.21 %

2450MHz 66.45 %

2500MHz 57.53 %

RAIN International Technology Co., Ltd.

: 13530576606 TEL: 13530576606 6 10 2.4GHz 3216 Chip Antenna: 3216F245M02 4.Reliability and Test Condictions REQUIREMENTS ITEM 1. Wetting shall exceed 90% coverage Solderability 2. No visible mechanical damage TEMP () 230 150 41 sec. 60sec Solder heat Resistance 1. No visible mechanical damage 2. Central Freq. change :within 6%

TEMP () 260 150 100.5 sec. 60sec 1. No visible mechanical damage 1. No visible mechanical damage Component Adhesion

(Push test) Component Adhesion

(Pull test) TEST CONDITION Pre-heating temperature:150/60sec. Solder temperature:2305 Duration:41sec. Solder:Sn-Ag3.0-Cu0.5 Flux for lead free: rosin Pre-heating temperature:150/60sec. Solder temperature:2605 Duration:100.5sec. Solder:Sn-Ag3.0-Cu0.5 Flux for lead free: rosin The device should be reflow soldered(2305 for 10sec.) to a tinned copper substrate A dynometer force gauge should be applied the side of the component. The device must with-ST-F 0.5 Kg without failure of the termination attached to component. Insert 10cm wire into the remaining open eye bend ,the ends of even wire lengths upward and wind together. Terminal shall not be remarkably damaged. RAIN International Technology Co., Ltd.

: 13530576606 TEL: 13530576606 7 10 2.4GHz 3216 Chip Antenna: 3216F245M02 1. No visible mechanical damage Thermal shock 2. Central Freq. change :within 6%

Phase 1 2 3 4 Temperature() Time(min)

+855 Room Temperature 303 Within 3sec

-402 Room Temperature 303 Within 3sec Resistance to High Temperature 1. No visible mechanical damage 2. Central Freq. change :within 6%

3. No disconnection or short circuit. Resistance to Low Temperature 1. No visible mechanical damage 2. Central Freq. change :within 6%

3. No disconnection or short circuit. Humidity 1. No visible mechanical damage 2. Central Freq. change :within 6%

3. No disconnection or short circuit. 5.Soldering and Mounting

+85=>303min

-40=>303min Test cycle:10 cycles The chip shall be stabilized at normal condition for 2~3 hours before measuring. Temperature: 855 Duration: 100012hrs The chip shall be stabilized at normal condition for 2~3 hours before measuring. Temperature:-405 Duration: 100012hrs The chip shall be stabilized at normal condition for 2~3 hours before measuring. Temperature: 402 Humidity: 90% to 95% RH Duration: 100012hrs The chip shall be stabilized at normal condition for 2~3 hours before measuring. Mildly activated rosin fluxes are preferred. The minimum amount of solder can lead to damage from the stresses caused by the difference in coefficients of expansion between solder, chip and substrate. The terminations are suitable for all wave and re-flow soldering systems. If hand soldering cannot be avoided, the preferred technique is the utilization of hot air soldering tools. Reflow Soldering PRE-HEATING SOLDERING 10s max. NATURAL COOLING 250~260 230 180 150

) C

E R U T A R E P M E T 60~120 s 30~60s Iron Soldering PRE-HEATING SOLDERING within 3s NATURAL COOLING 350 300 150

) C

E R U T A R E P M E T TIME(sec.) TIME(sec.) Over 60s Gradual cooling Recommended temperature profiles for re-flow soldering in Figure 1. Products attachment with a soldering iron is discouraged due to the inherent

: 13530576606 process control limitations. In the event that a soldering iron must be RAIN International Technology Co., Ltd. employed the following precautions are recommended. TEL: 13530576606 8 10 2.4GHz 3216 Chip Antenna: 3216F245M02 Preheat circuit and products to 150 Never contact the ceramic with the iron tip Use a 20 watt soldering iron with tip diameter of 1.0mm 280 tip temperature (max) 1.0mm tip diameter (max) Limit soldering time to 3 sec. 6.Packaging Information Tape Specification:

1.80 1.59 3.51 RAIN International Technology Co., Ltd. Reel Specification: (7, 180 mm)

: 13530576606 TEL: 13530576606 9 10 2.4GHz 3216 Chip Antenna: 3216F245M02 Tape Width(mm) A(mm) B(mm) C(mm) D(mm) Chip/Reel(pcs) 8 9.00.5 602 13.50.5 1782 3000 7.Storage and Transportation Information Storage Conditions To maintain the solderability of terminal electrodes:

1. Temperature and humidity conditions: -10~ 40 and 30~70% RH. 2. Recommended products should be used within 6 months from the time of delivery. 3. The packaging material should be kept where no chlorine or sulfur exists in the air. Transportation Conditions 1. Products should be handled with care to avoid damage or contamination from perspiration and skin oils. 2. The use of tweezers or vacuum pick up is strongly recommended for individual components. 3. Bulk handling should ensure that abrasion and mechanical shock are minimized. RAIN International Technology Co., Ltd.

: 13530576606 TEL: 13530576606 10 10

SHEN ZHEN VIMAI TECHNOLOGY CO.,LTD Date: December 12, 2023 Product Model Number: V49-A FCC ID2A88Y-V49-A 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 ORGANIZATION. 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 ORGANIZATION. on our behalf shall have the same effect as acts of our own. By:

Contact Listed on FCC Wesbite Title: Manager Email: 3356403002@qq.com Telephone: 15521934892 On behalf of: SHEN ZHEN VIMAI TECHNOLOGY CO.,LTD Effective Date: April 2, 2020 Revision Date:

QSF 7.6.4-8 Agent Authorization Letter Template Revision: 0 Page 1 of 1

SHEN ZHEN VIMAI TECHNOLOGY CO.,LTD Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Subject; Request for Confidentiality FCC ID: 2A88Y-V49-A To Whom It May Concern, Date: December 12, 2023 Pursuant to the provisions of the Commissions 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 Operational Description 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:Xie zexuan Title:Manager

SHEN ZHEN VIMAI TECHNOLOGY CO.,LTD Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: December 12, 2023 FCC ID: 2A88Y-V49-A Ref. #1: Attestation Statements Part 2.911(d)(5)(i) Filing SHEN ZHEN VIMAI TECHNOLOGY CO.,LTDcertifies 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. Ref. #2: Attestation Statements Part 2.911(d)(5)(ii) Filing SHEN ZHEN VIMAI 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. Applicant: SHEN ZHEN VIMAI TECHNOLOGY CO.,LTD Address: Floor 3, building B, no. 5 huating road, tongsheng community, dalang street, longhua district, shenzhen,China Contact Person: Xie zexuan Tel.: 15521934892 Email: 3356403002@qq.com Sincerely, Signature:

SHEN ZHEN VIMAI TECHNOLOGY CO.,LTD AddressFloor 3, building B, no. 5 huating road, tongsheng community, dalang street, longhua district, shenzhen,China FRN:0033055526 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements Part 2.911(d)(7) Filing SUBJECT: FCC Application for FCC ID: 2A88Y-V49-A SHEN ZHEN VIMAI TECHNOLOGY CO.,LTD. certifies that, as of the date of the filing of the application, Cleveland International Trade Agency . is our designated U.S. agent for service of process for the above referenced FCC ID. SHEN ZHEN VIMAI TECHNOLOGY CO.,LTD 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. Cleveland International Trade Agency accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent Information:

Name: Cleveland International Trade Agency Address: 4033 St Clair Ave, Cleveland, OH 44103, USA Contact Person: Becky Deng Tel.: 216-600-0606 Email: Georgewu7012@gmail.com FRN:0033401837 Sincerely, Signed on behalf of SHEN ZHEN VIMAI TECHNOLOGY CO.,LTD Signed on behalf of Cleveland International Trade Agency Signature Name: Xie zexuan Signature Name:Becky Deng Title: Manager Title: Manager Date: December 12, 2023 Date: December 12, 2023