2AXPW-MD037TWS Bluetooth headset

MD037 MD037 IC Caution This device complies with Industry Canada’s licence-exempt RSSs. Operation is subject to the following two conditions: (1) This device may not cause interference; and (2) This device must accept any interference, including interference that may cause undesired operation of the device. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux apparei ls radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes: (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si lebrouillage est susceptible d'en compromettre le fonctionnement. L’appareil a été évalué pour répondre aux exigences générales en matière d’exposition aux RF. L’appareil peut être utilisé en condition d’exposition portable sans restriction. FCC Caution 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. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 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 has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction.

Shenzhen Moldull Acoustic Technology Co.,Ltd. 2.911 (d)(5)(i) Equipment Type Attestation v1.2 Section 2.911(d)(5)(i) Certification – Equipment Type Company name: Shenzhen Moldull Acoustic Technology Co.,Ltd. Address: 403 Huiyi Wealth Center No.9, Zhongxin Road, Dalang, Longhua New Area, ShenZhen, China Product Name: TWS Bluetooth headset Model Number(s): MD037, M7 FCC ID: 2AXPW-MD037 2.911(d)(5)(i) Equipment Type We, Shenzhen Moldull Acoustic Technology Co.,Ltd.certify that the equipment for which authorization is sought through certification is not:  Prohibited from receiving an equipment authorization pursuant to § 2.903; of the FCC rules.  Identified as an equipment type in the “Covered List” NOTE 1 Yours sincerely, Signature: Name: Yifeng Zhang Date: 2023/05/24 Title: CEO Company name: Shenzhen Moldull Acoustic Technology Co.,Ltd. NOTE 1 “Covered List”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

Shenzhen Moldull Acoustic Technology Co.,Ltd. 2.911 (d)(5)(ii) Applicant Attestation v1.3 Section 2.911(d)(5)(ii) Certification – Applicant (Covered List ) Company name: Shenzhen Moldull Acoustic Technology Co.,Ltd. Address: 403 Huiyi Wealth Center No.9, Zhongxin Road, Dalang, Longhua New Area, ShenZhen, China Product Name: TWS Bluetooth headset Model Number(s): MD037, M7 FCC ID: 2AXPW-MD037 2.911(d)(5)(ii) Applicant filing We, Shenzhen Moldull Acoustic Technology Co.,Ltd.certify that, as of the date of the filing of the application, the applicant is not on the “Covered List” NOTE 1 , established pursuant to § 1.50002 of this chapter, as an entity producing covered communications equipment. Yours sincerely, Signature: Name: Yifeng Zhang Date: 2023/05/24 Title: CEO Company name: Shenzhen Moldull Acoustic Technology Co.,Ltd. NOTE 1 “Covered List”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

Shenzhen Moldull Acoustic Technology Co.,Ltd. Agent Authorization Company: Shenzhen Moldull Acoustic Technology Co.,Ltd. Address: 403 Huiyi Wealth Center No.9, Zhongxin Road, Dalang, Longhua New Area, ShenZhen, China Product Name: TWS Bluetooth headset Model Number(s): MD037, M7 FCC ID: 2AXPW-MD037 We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: 2023/05/24 Name: Yifeng Zhang Title: CEO Company: Shenzhen Moldull Acoustic Technology Co.,Ltd.

Shenzhen Moldull Acoustic Technology Co.,Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2023/05/24 Subject; Request for Confidentiality FCC ID: 2AXPW-MD037 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 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); User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuantto 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: Yifeng Zhang Title: CEO

Shenzhen Moldull Acoustic Technology Co.,Ltd. Model Difference EUT NAME: TWS Bluetooth headset MODEL: MD037, M7 All the model are the same circuit and RF module, except model names. Regards Sincerely Client’s signature: Client’s name / title : Yifeng Zhang /CEO Contact information / address: 403 Huiyi Wealth Center No.9, Zhongxin Road, Dalang, Longhua New Area, ShenZhen, China

External Photos R L

10*5mm Label Location HVIN: MD037 IC: 30259-MD037 FCC ID: 2AXPW-MD037

Internal Photos R Antenna L

FCC ID: 2AXPW-MD037 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. 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 GFSK 2.441 -1.43 0.72 -1±1 0.00 1.00 <5 0.31247 3.00 YES π/ 4 DQPSK 2.441 -0.63 0.86 0±1 1.00 1.26 <5 0.39338 3.00 YES Conclusion: For the max result : 0.39338＜3, the SAR testing is not required.

深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 1.0(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H3) Engineering Specification DOCUMENT YF3216H3X2G45 REV. NO. D PAGE 1 OF 12 3.2X1.6X1.0 (mm) WiFi/Bluetooth Ceramic Chip Antenna Engineering Specification 1. Product Number (1)Product Type Chip Antenna (2)Size Code 3.2x1.6x1.0mm (3)Type Code H3 (4)Packing Plastic Packaging (5)Frequency 2.45GHz YF 3216 H3 X 2G45 1 2 3 4 5 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 1.0(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H3) Engineering Specification DOCUMENT YF3216H3X2G45 REV. NO. D PAGE 2 OF 12 2.Features *Stable and reliable in performances *Low temperature coefficient of frequency *Low profile, compact size *RoHS compliance *SMT processes compatible 3.Applications *Bluetooth earphone systems *Hand-held devices when WiFi /Bluetooth functions are needed, e.g., Smart phone. *IEEE802.11 b/g/n *ZigBee *Wireless PCMCIA cards or USB dongle 4.Description Yingfeng chip antenna series are specially designed for WiFi/Bluetooth applications. Based on yingfeng proprietary design and processes, this chip antenna has excellent stability and sensitivity to consistently provide high signal reception efficiency. 5.Electrical Specifications (80 x 40 mm 2 ground plane) 5-1. Electrical Table Characteristics Specifications Unit Outline Dimensions 3.2x1.6x1.0 mm Working Frequency 2400~2500 MHz VSWR 2 Max. Impedance 50  Polarization Linear Polarization Gain Peak 2.5 dBi Efficiency 80 (typical) % 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 1.0(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H3) Engineering Specification DOCUMENT YF3216H3X2G45 REV. NO. D PAGE 3 OF 12 5-2. Return Loss & VSWR Return Loss (S 11 ) VSWR(S 11 ) 6. Antenna Dimensions & Test Board (unit: mm) a. Antenna Dimensions b. Test Board with Antenna 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 1.0(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H3) Engineering Specification DOCUMENT YF3216H3X2G45 REV. NO. D PAGE 4 OF 12 80 40 Unit: mm 7. Radiation Pattern (80 x 40 mm 2 ground plane) 7-1. 3D Gain Pattern @ 2442 MHz Z X Y 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 1.0(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H3) Engineering Specification DOCUMENT YF3216H3X2G45 REV. NO. D PAGE 5 OF 12 7-2. 3D Efficiency Table Frequency( MHz) 2400 2410 2420 2430 2442 2450 2460 2470 2480 2490 2500 Efficiency (dB) -1.4 -1.0 -0.9 -0.7 -0.7 -0.8 -0.9 -1.1 -1.2 -1.3 -1.4 Efficiency (%) 72.8 73.7 74.3 74.4 75.5 75.0 74.0 73.6 73.1 72.6 71.5 Gain (dBi) 2.1 2.2 2.3 2.4 2.5 2.5 2.4 1.8 1.7 1.6 1.4 Y X Z Y X X Y Z 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 1.0(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H3) Engineering Specification DOCUMENT YF3216H3X2G45 REV. NO. D PAGE 6 OF 12 7-3. 3D Efficiency vs. Frequency 8. Layout Guide a. Solder Land Pattern: Land pattern for soldering (gray marking areas) is as shown below. Depending on Customer’s requirement, matching circuit as shown below is also recommended. Efficiency vs. Frequency 50 60 70 80 90 100 24002410242024302442245024602470248024902500 Frequency(MHz) Efficiency(%) 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 1.0(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H3) Engineering Specification DOCUMENT YF3216H3X2G45 REV. NO. D PAGE 7 OF 12 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 1.0(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H3) Engineering Specification DOCUMENT YF3216H3X2G45 REV. NO. D PAGE 8 OF 12 9. Frequency tuning a. Chip antenna tuning scenario： b. Matching circuit：(Center frequency is about 2442 MHz @ 80 x 40 mm 2 ground plane) System Matching Circuit Component Location Description Vendor Toleranc e 1 1.2 pF* Murata (0402) ±0.1 pF 2 10PF* Murata(0402) ±0.5 PF 3 N/A* - - Fine tuning element 4 1.5 pF* Murata (0402) ±0.1 pF *Typical reference values which may need to be changed when circuit boards or part vendors are different. Matching circuit Feed 4. Fine tuning elemet 1 2 3 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 1.0(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H3) Engineering Specification DOCUMENT YF3216H3X2G45 REV. NO. D PAGE 9 OF 12 c. Fine tuning element vs. Center frequency 10. Soldering Conditions a. Typical Soldering Profile for Lead-free Process Time 60-180s 60-150s 20- Pre- 150-200° 217°C 260° Temperature (°C) 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6 x 1.0(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF3216H3) Engineering Specification DOCUMENT YF3216H3X2G45 REV. NO. D PAGE 10 OF 12 11. Packing (1) Quantity/Reel: 3000 pcs/Reel: Packaging Information  Tape Specification: W Ao Bo Ko P F E D D1 Po P2 t 8.0 ±0.30 1.80 ±0.05 3.51 ±0.10 1.59 ±0.10 4.00 ±0.05 3.50 ±0.05 1.75 ±0.10 1.50 ±0.10 0.00 ±0.10 4.00 ±0.10 2.00 ±0.05 0.25 ±0.05  Reel Specification: (7’’, Φ180 mm) Tape Width(mm) A(mm) B(mm) C(mm) D(mm) Chip/Reel(pcs) 8 9.0±0.5 60±2 13.5±0.5 178±2 3000 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Pr…

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No.：BCTC/RF-EMC-007 Page: 1 of 65 Edition：A.5 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2304595349E Applicant: Shenzhen Moldull Acoustic Technology Co.,Ltd. Product Name: TWS Bluetooth headset Model/Type reference: MD037 Tested Date: 2023-05-04 to 2023-05-12 Issued Date: 2023-05-15 Report No.: BCTC2304595349E No.：BCTC/RF-EMC-007 Page: 2 of 65 Edition：A.5 FCC ID: 2AXPW-MD037 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: TWS Bluetooth headset Trademark: N/A Model/Type Reference: MD037 M7 Prepared For: Shenzhen Moldull Acoustic Technology Co.,Ltd. Address: 403 Huiyi Wealth Center No.9, Zhongxin Road, Dalang, Longhua New Area, ShenZhen, China Manufacturer: Shenzhen Moldull Acoustic Technology Co.,Ltd. Address: 403 Huiyi Wealth Center No.9, Zhongxin Road, Dalang, Longhua New Area, ShenZhen, 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: 2023-05-04 Sample tested Date: 2023-05-04 to 2023-05-12 Issue Date: 2023-05-15 Report No.: BCTC2304595349E Test Standards FCC Part15.247 ANSI C63.10-2013 Test Results PASS Remark: This is Bluetooth Classic radio test report. Tested by: Approved by: Eric Yang/Project Handler Zero Zhou/Reviewer Report No.: BCTC2304595349E No.：BCTC/RF-EMC-007 Page: 3 of 65 Edition：A.5 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 ...................................................................................... 8 4.3 Support Equipment ............................................................................................... 8 4.4 Channel List .......................................................................................................... 9 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 ..... 23 8.1 Block Diagram Of Test Setup .............................................................................. 23 8.2 Limit .................................................................................................................... 23 8.3 Test procedure .................................................................................................... 24 8.4 EUT operating Conditions ................................................................................... 24 8.5 Test Result .......................................................................................................... 25 9. Spurious RF Conducted Emissions ..................................................................... 26 9.1 Block Diagram Of Test Setup .............................................................................. 26 9.2 Limit .................................................................................................................... 26 9.3 Test procedure .................................................................................................... 26 9.4 Test Result ...............................................................…

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Conducted Measurement Photo Radiated Measurement Photos