2APMJ-FITBUDS1Bluetooth headset

FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this 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. This device and its antenna(s) must not be co-located or operating in conjunction with any other antenna or transmitter. 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. The device(FCC ID: 2APMJ-FITBUDS1) has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction

Shenzhen DOKE Electronic Co., Ltd 13th Floor, Weidonglong commercial building B, Meilong avenue, Longhua New District, Shenzhen, China Date: 05/08/2021 FCC ID: 2APMJ-FITBUDS1 Model Number: FitBuds 1 To: Federal Communication Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21048 To Whom It May Concern, We, Shenzhen DOKE Electronic Co., Ltd declare that this EUT (FCC ID: 2APMJ-FITBUDS1) will conduct FCC compliance testing, the sDOC part recognized test lab(Shenzhen NTEK Testing Technology Co., Ltd.). 1/F, Building E, Fenda Science Park, Sanwei Community, Xixiang Street Bao’an District, Shenzhen 518126 P.R. China Please contact me if you have any question. Sincerely, (Signed) Name / Title: Aiting Yin / Manager Company: Shenzhen DOKE Electronic Co., Ltd Address: 13th Floor, Weidonglong commercial building B, Meilong avenue, Longhua New District, Shenzhen, China Phone: 18124004099 Fax: 0755-6668278 Email: [email protected]

Shenzhen DOKE Electronic Co., Ltd Agent Authorization Letter (2021-05-08) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen NTEK Testing Technology Co., Ltd. 1/F, Building E, Fenda Science Park Sanwei, Xixiang, Bao'an District, Shenzhen, Guangdong, China Alex.li [email protected] 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, Aiting Yin / Manager Date/City: 2021-05-08/Shenzhen Phone: 18124004099 Fax: 0755-6668278 E-mail: [email protected]

Shenzhen DOKE Electronic Co., Ltd Long Term Confidentiality Request Letter (2021-05-08) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR Product: Bluetooth headset Model No.: FitBuds 1 FCC ID: 2APMJ-FITBUDS1 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  Schematic Diagram  Block Diagram  Operational Description Required to be submitted with this application be permanently withheld from public review. 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. Please contact me if there is any information you may need. Sincerely, Aiting Yin / Manager Date/City: 2021-05-08/Shenzhen Phone: 18124004099 Fax: 0755-6668278 E-mail: [email protected]

Shenzhen DOKE Electronic Co., Ltd Short Term Confidentiality Request Letter (2021-05-08) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Short Term Confidentiality Request For Product: Bluetooth headset Model No.: FitBuds 1 FCC ID: 2APMJ-FITBUDS1 To Whom It May Concern: In accordance with sections 0.457 and 0.459 of CFR 47, < Shenzhen DOKE Electronic Co., Ltd >. requests short-term Confidentiality of following sections of this application for a period of 180 days after grant is issued. Test setup photos External photos Internal photos User’s manual These documents contain detailed system and equipment descriptions and related information about the product, which < Shenzhen DOKE Electronic Co., Ltd > considers to be proprietary, confidential, and a custom design and otherwise, would not release to the general public. Since this design is a basis from which future technological products will evolve, < Shenzhen DOKE Electronic Co., Ltd > feels that this information would be of benefit to its competitors, and that the disclosure of the information in these documents would give our competitors an unfair advantage in the market. Please contact me if there is any information you may need. Sincerely, Aiting Yin / Manager Date/City: 2021-05-08/Shenzhen Phone: 18124004099 Fax: 0755-6668278 E-mail: [email protected]

ATTACHMENT PHOTOGRAPHS OF EUT Photo 1 Photo 2 Photo 3 Photo 4 Photo 5

37 mm21.285 mm 7 mm 3.25 mm 1.446 mm Color:PANTONE Cool Gary 5 C Method:silkscreen(丝印） Color:PANTONE Cool Gary 5 C Method:silkscreen(丝印）

ATTACHMENT PHOTOGRAPHS OF EUT Photo 1 Photo 2 Photo 3 Photo 4 BT ANT Photo 5

FCC ID: 2APMJ-FITBUDS1 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 calculation SAR Exclusion threshold SAR test exclusion 2.402 -4.27 0.37-4±1-30.50<50.155353.00YES 2.441-3.62 0.43-4±1-30.50<50.156613.00YES 2.480-3.2 0.48-4±1-30.50<50.157853.00YES 2.402 -2.51 0.56-2±1-10.79<50.246223.00YES 2.441-1.849 0.65-2±1-10.79<50.248213.00YES 2.480-1.1 0.78-2±1-10.79<50.250183.00YES 2.402-2.183 0.60-1.5±1-0.50.89<50.276263.00YES 2.441-1.485 0.71-1.5±1-0.50.89<50.278493.00YES 2.480-0.516 0.89-1.5±1-0.50.89<50.280713.00YES GFSK π/4- DQPSK 8-DQPSK Conclusion: For the max result : 0.28071 ≤ 3.0 for 1g SAR, SAR is not required. Signature: Date: 2021-05-08 NAME AND TITLE (Please print or type): Alex li /Manager COMPANY (Please print or type): Shenzhen NTEK Testing Technology Co., Ltd./ 1/F, Building E, Fenda Science Park, Sanwei Community, Xixiang Street Bao’an District, Shenzhen P.R. China.

Report No.: STR210406002001E Version.1.3 Page 1 of 83 RADIO TEST REPORT FCC ID: 2APMJ-FITBUDS1 Product: Bluetooth headset Trade Mark: Blackview, OSCAL Model No.: FitBuds 1 Family Model: N/A Report No.: STR210406002001E Issue Date: Apr 27. 2021 Prepared for Shenzhen DOKE Electronic Co., Ltd 13th Floor, Weidonglong commercial building B, Meilong avenue, Longhua New District, Shenzhen, China Prepared by Shenzhen NTEK Testing Technology Co., Ltd. 1/F, Building E, Fenda Science Park, Sanwei Community, Xixiang Street Bao’an District, Shenzhen 518126 P.R. China Tel:400-800-6106,0755-2320 0050 / 2320 0090 Website: http://www.ntek.org.cn Report No.: STR210406002001E Version.1.3 Page 2 of 83 TABLE OF CONTENTS 1 TEST RESULT CERTIFICATION ...................................................................................................................... 3 2 SUMMARY OF TEST RESULTS ......................................................................................................................... 4 3 FACILITIES AND ACCREDITATIONS ............................................................................................................. 5 3.1 FACILITIES..................................................................................................................................................... 5 3.2 LABORATORY ACCREDITATIONS AND LISTINGS ................................................................................. 5 3.3 MEASUREMENT UNCERTAINTY ............................................................................................................... 5 4 GENERAL DESCRIPTION OF EUT .................................................................................................................. 6 5 DESCRIPTION OF TEST MODES ..................................................................................................................... 8 6 SETUP OF EQUIPMENT UNDER TEST ........................................................................................................... 9 6.1 BLOCK DIAGRAM CONFIGURATION OF TEST SYSTEM ....................................................................... 9 6.2 SUPPORT EQUIPMENT ............................................................................................................................... 10 6.3 EQUIPMENTS LIST FOR ALL TEST ITEMS .............................................................................................. 11 7 TEST REQUIREMENTS .................................................................................................................................... 13 7.1 CONDUCTED EMISSIONS TEST ............................................................................................................... 13 7.2 RADIATED SPURIOUS EMISSION ............................................................................................................ 16 7.3 NUMBER OF HOPPING CHANNEL ........................................................................................................... 25 7.4 HOPPING CHANNEL SEPARATION MEASUREMENT ........................................................................... 26 7.5 AVERAGE TIME OF OCCUPANCY (DWELL TIME) ................................................................................ 27 7.6 20DB BANDWIDTH TEST .......................................................................................................................... 29 7.7 PEAK OUTPUT POWER .............................................................................................................................. 30 7.8 CONDUCTED BAND EDGE MEASUREMENT......................................................................................... 31 7.9 SPURIOUS RF CONDUCTED EMISSION .................................................................................................. 32 7.10 ANTENNA APPLICATION .......................................................................................................................... 33 7.11 FREQUENCY HOPPING SYSTEM (FHSS) EQUIPMENT REQUIREMENTS ......................................... 34 8 TEST RESULTS ................................................................................................................................................... 35 8.1 DWELL TIME ............................................................................................................................................... 35 8.2 MAXIMUM CONDUCTED OUTPUT POWER ........................................................................................... 40 8.3 OCCUPIED CHANNEL BANDWIDTH ....................................................................................................... 45 8.4 CARRIER FREQUENCIES SEPARATION .................................................................................................. 55 8.5 NUMBER OF HOPPING CHANNEL ........................................................................................................... 60 8.6 BAND EDGE ................................................................................................................................................. 61 8.7 CONDUCTED RF SPURIOUS EMISSION .................................................................................................. 74 Report No.: STR210406002001E Version.1.3 Page 3 of 83 1 TEST RESULT CERTIFICATION Applicant’s name ........................ : Shenzhen DOKE Electronic Co., Ltd Address ....................................... : 13th Floor, Weidonglong commercial building B, Meilong avenue, Longhua New District, Shenzhen, China Manufacturer's Name ................. : Jiangxi Lianchuang Hongsheng Electronic Co., Ltd. Address ....................................... : No.1699, Jingdong Avenue, High-tech Industry Development Zone, Qingshanhu District, Nanchang City, Jiangxi, P.R.China Product description Product name ............................. : Bluetooth headset Model and/or type reference ..... : FitBuds 1 Family Model .........................…

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Radiated Measurement Photos Conducted Measurement Photos