2AXPW-MD056TWS earbuds

(Shenzhen Moldull Acoustic Technology Co.,Ltd.) (August 21, 2024) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for (FCC ID: 2AXPW-MD056) [Shenzhen Moldull Acoustic Technology Co.,Ltd.] (“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. Sincerely, (Applicant signature) (Applicant printed name) Yifeng Zhang (Shenzhen Moldull Acoustic Technology Co.,Ltd.) (August 21, 2024) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for (FCC ID: 2AXPW-MD056) [Shenzhen Moldull Acoustic Technology Co.,Ltd.] (“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. Sincerely, (Applicant signature) (Applicant printed name) Yifeng Zhang

Shenzhen Moldull Acoustic Technology Co.,Ltd. Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 4/18/24 U.S. Agent Designation [Shenzhen Moldull Acoustic Technology Co.,Ltd.] acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought (FCC ID: [2AXPW-MD056]): Name and company of U.S. agent:Linkwld LLC Physical U.S. address of agent:1942 Broadway St. STE 314C, Boulder, CO, 80302, US FRN of U.S. agent:0033625682 Email address of U.S. agent:[email protected] [Linkwld LLC] acknowledges their obligation to accept service of process on behalf of [Shenzhen Moldull Acoustic Technology Co.,Ltd.]. [Shenzhen Moldull Acoustic Technology Co.,Ltd.] with the FRN [0030035208] accepts its obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(d)(7). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. An expiration date for this letter does not exist. In case the U.S. agent changes, the grantee is obligated to notify the FCC within 30 days via the granting TCB. Sincerely, Signature [Name]Man Hu [Title] Product Director [Company] Shenzhen Moldull Acoustic Technology Co.,Ltd. 4 8 _ [ m o d e l ] U S _ A g e n t _ 2 . 9 1 1 ( d ) ( 7 ) - U , V 0 5 ShenzhenMoldullAcousticTechnologyCo.,Ltd. Signature [NameofU.S.agent]TimothyZhu [TitleofU.S.agent]Manager [CompanyofU.S.agent]LinkwldLLC

Shenzhen Moldull Acoustic Technology Co.,Ltd. (August 21, 2024) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (TWS earbuds / MD056 / FCC ID: 2AXPW-MD056 ) 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 Exhibits Long-Term Confidentiality Short-Term Confidentiality NOTE 2 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 ☐ NOTE 1 ☒ Internal Photos ☐ NOTE 1 ☒ Parts List / Tune Up ☐ ☐ RF Exposure Info No No Operational Description ☒ ☐ Cover Letter(s) No No SDR Software / Security Info ☐ No 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. Please contact me if there is any information you may need. Sincerely, Signature: Name: Yifeng Zhang Title: CEO

Shenzhen Moldull Acoustic Technology Co.,Ltd. (August 21, 2024) 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 CTB Testing Technology Co., Ltd.) 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, Signature: Name: Yifeng Zhang Title: CEO

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 6 Model: MD056 External Photos Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 6 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 3 of 6 L Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 4 of 6 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 5 of 6 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 6 of 6

FCC ID LABEL: Label Location: FCC ID: 2AXPW-MD056 Model No.: MD056

Shenzhen CTB Testing Co., Ltd. FCC ID: 2AXPW-MD056 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. EDR: 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 2.402 2.605 1.82 2±1 3.00 2.00 <5 0.61847 3.00 YES 2.441 2.318 1.71 2±1 3.00 2.00 <5 0.62347 3.00 YES 2.480 0.805 1.20 0±1 1.00 1.26 <5 0.39651 3.00 YES 2.402 3.006 2.00 3±1 4.00 2.51 <5 0.77860 3.00 YES 2.441 2.649 1.84 2±1 3.00 2.00 <5 0.62347 3.00 YES 2.480 1.236 1.33 1±1 2.00 1.58 <5 0.49918 3.00 YES 2.402 3.157 2.07 3±1 4.00 2.51 <5 0.77860 3.00 YES 2.441 2.873 1.94 2±1 3.00 2.00 <5 0.62347 3.00 YES 2.480 1.549 1.43 1±1 2.00 1.58 <5 0.49918 3.00 YES GFSK π /4DQPSK 8DQPSK Conclusion: For the max result : 0.77860≤ FCC Limit 3.0 for 1g SAR.

GuangdongDongyouTechnologyCo.,LTDA2012C2G42M100-02 Address:Room202,Building10,No.1JingdongRoad,FenggangTown,DongguanCity, GuangdongProvince SPECIFICATIONFORAPPROVAL 承认书 CUSTOMER 客户名称： CUSTOMER’SP/N 客户料号： PARTNUMBER 料号： ISSUEDATE 日期： CUSTOMERAPPROVED 客户承认 GuangdongDongyouTechnologyCo.,LTDA2012C2G42M100-02 Address:Room202,Building10,No.1JingdongRoad,FenggangTown,DongguanCity, GuangdongProvince A2012C2G42M100-02Chipantenna ※Features： MonolithicSMD withsmall,low-profileandlight-weighttype.  Widebandwidth RoHScompliant Size:2x1.2x0.4 ※ Applications ：  Bluetooth/WirelessLAN/HomeRF  ISMband2.4GHzapplications Guangdong Dongyou Technology Co., LTDA2012C2G42M100-02 Address: Room 202, Building 10, No.1 Ji ngdong Road, Fenggang Town, Dongguan Ci ty , Guangdong Province Specification s： Part Number Lnformation : A2012C2G42M100- 02 AAntenna2G 42CenterFrequency=2.42G 2012Size2.0x 1.2M10 0Bandwidth100 M CCapacitive02Part Number Center frequency 2.42GHz Bandwidth 100MHz(typ.) Peak gain 2.5dBi(typ.) (XZ-V) AverageGain 0.5dBi(typ.) (XZ-V) VSWR <2.3 Impedance 50Ω Power Capacity 3 W( max) Operationtemperature -40 ~ +85 °C Storagetemperature -40 ~ +85 °C GuangdongDongyouTechnologyCo.,LTDA2012C2G42M100-02 Address:Room202,Building10,No.1JingdongRoad,FenggangTown,DongguanCity, GuangdongProvince Structuredescription: PinNo. 1 2 Pinassignment FeedingPoint GND Note:OneofthesetwopadsisconnectedwithRFsignal,andtheotherisusedfor fixingwithoutreceivinganysignal.Theleftandrightsidesofthesetwopadsare completelysymmetric,anddonotdistinguishbetweenpositiveandnegativeandleft andright. Descriptionofdimensions： Symbol(mm) L WHA1 Dimensions 2.0±0.051.2±0.050.4±0.050.35±0.05 2 1 GuangdongDongyouTechnologyCo.,LTDA2012C2G42M100-02 Address:Room202,Building10,No.1JingdongRoad,FenggangTown,DongguanCity, GuangdongProvince Antennaplacementandclearanceprocessingandmatchingnetwork diagram Impedance matchingdevice values 并联器件Shunt1 1.2pF 串联器件Series1 0R 并联器件Shunt2 NC 串联器件Series2 0R Thethreematchingdevicestogetherformaπ-shapedmatchingnetworkfor impedancematchingofA2012C2G42M100-02patchantenna.Thespecificdevice valuesofthesematchingdevicesneedtobeobtainedaftertheantennaimpedance matchinganddebugging.Thedevicevaluesshownintheabovefigurearethevalues ofourtestcircuitboardandcanbeusedasreferencevalues.Ifyoudonotrequirehigh antennaperformance,youcanalsousetheabovereferencevaluesdirectly. Linewidthshouldbedesignedtomatch50Ohmcharacteristicimpedance,depending onPCBmaterialandthickness. Itisrecommendedthattheantennabeplacedontheedgeorcornerofthecircuitboard, GuangdongDongyouTechnologyCo.,LTDA2012C2G42M100-02 Address:Room202,Building10,No.1JingdongRoad,FenggangTown,DongguanCity, GuangdongProvince donotplacetheantennainthemiddleofthecircuitboard,anddonotlettheantenna besurroundedbyconductors. ClearanceisrequiredneartheantennaAreaofthecircuitboard.Asshownbelow,the EmptyArea(whitearea)inthecircuitboardistheclearanceareaoftheantenna.The so-calledclearanceareareferstoanareathatcannotbepavedandroutedexceptfor antennapadsandantennasignalwiring.Theclearancetreatmentofthisareashouldbe foralllayersofthePCBboard,notjustforthesurfacelayer. Theantennaheadroomareashouldbeaslargeaspossible,andtheantennashouldbe placedascloseaspossibletotheedgeoftheboard,sothattheantennabodyisaway fromthecircuitboard,andthelargerheadroommeansbetterantennaefficiencyand gainperformance. Inthestructureofthewholemachine,itisrecommendedthatthereisnoconductor aboveorbelowtheheadroomareaoverlookingthePCBdirection,otherwisethe antennaperformancewillbeaffected. Non-clearanceareasneedtobepaved,andthegroundbetweendifferentlayersshould beincreasedasmuchaspossiblethroughtheholeconnection. Anytypeofantennaneedstobeimpedancematchedtoensurethattheantenna performancemeetstherequirementsoftheimpedancespecification,andthe A2012C2G42M100-02patchantennaalsoneedstoaddamatchingnetworktoensure thattheantennaperformancemeetsthestandard. Thedeviceusedforantennamatchingdebuggingisanetworkanalyzer.Ifyouarean antennaprofessionaltechnician,youcanpassthenetworkbyyourself GuangdongDongyouTechnologyCo.,LTDA2012C2G42M100-02 Address:Room202,Building10,No.1JingdongRoad,FenggangTown,DongguanCity, GuangdongProvince Networkanalyzerforantennamatchingdebugging.Ifyoudonothavetherelevant technology,pleasecontactus,wecanprovideyourproducts Forprofessionalantennaimpedancedebuggingservices.Forantennamatching debugging,youneedtoprovidethewholeproduct(itdoesnotneedtobeturnedon). Pleasenotethattheantennaimpedancematchingdebuggingmentionedhereis unrelatedtotheRFwireimpedancecontrol.TheRFwireimpedancecontrolisonly fortheRFwireroutinginthepavedarea,andtheantennaimpedancematchinghereis fortheantenna.Pleasedonotconfusethetwo. 2、MeasurementResults S11LogMag： S11SmithR+jx： GuangdongDongyouTechnologyCo.,LTDA2012C2G42M100-02 Address:Room202,Building10,No.1JingdongRoad,FenggangTown,DongguanCity, GuangdongProvince S11SWR： GuangdongDongyouTechnologyCo.,LTDA2012C2G42M100-02 Address:Room202,Building10,No.1JingdongRoad,FenggangTown,DongguanCity, GuangdongProvince 3、ReliabilityandTestCondictions ITEM REQUIREMENTS TESTCONDITION Solderability1.Wettingshallexceed90%coverage 2.Novisiblemechanicaldamage TEMP(C) Pre-heatingtemperature:150C/60sec. Soldertemperature:230±5C Duration:4±1sec. Solder:Sn-Ag3.0-Cu0.5 Fluxforleadfree:rosin 230°C 150 C 4±1sec. 60sec Solderheat Resistance 1.Novisiblemechanicaldamage 2.CentralFreq.change:within±6% TEMP( C ) 260°C 150 C Pre-heatingtemperature:150C/60sec. Soldertemperature:260 ± 5 C Duration:10±0.5sec. Solder:Sn-Ag3.0-Cu0.5 Fluxforleadfree:rosin Component Adhesion (Pushtest) 1.Novisiblemechanicaldamage Thedeviceshouldbereflow soldered(230±5Cfor10sec.)toatinned coppersubstrateAdynometerforce gaugeshouldbeappliedthesideofthe component.Thedevicemustwith-ST-F 0.5Kgwithoutfailureofthetermination attachedtocomponent. Component Adhesion (Pulltest) 1.Novisiblemechanicaldamage Insert10cmwireintotheremainingopen eyebend,theendsofevenwirelengths upwardandwindtogether. Terminalshallnotberemarkably damaged. Thermalshock 1…

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TEST REPORT Compiled by: Reviewed by: Approved by: Zhou Kui Arron Liu Bin Mei / Director Note: If there is any objection to the inspection results in this report, please submit a written report to the company within 15 days from the date of receiving the report. 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 CTB Testing Technology Co., Ltd. this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. “*” indicates the testing items were fulfilled by subcontracted lab. “#” indicates the items are not in CNAS accreditation scope. Product Name: TWS earbuds FCC ID: 2AXPW-MD056 Trademark: N/A Model Number: MD056 Prepared For: Shenzhen Moldull Acoustic Technology Co.,Ltd. Address: 403 Huiyi Wealth Center No.9, Zhongxin Road, Dalang Longhua New Area Shenzhen City, Guangdong Province, China Manufacturer: Shenzhen Moldull Acoustic Technology Co.,Ltd. Address: 403 Huiyi Wealth Center No.9, Zhongxin Road, Dalang Longhua New Area Shenzhen City, Guangdong Province, China Prepared By: Shenzhen CTB Testing Technology Co., Ltd. Address: 1&2/F., Building A, No.26, Xinhe Road, Xinqiao, Xinqiao Street, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: Jul. 26, 2024 Sample tested Date: Jul. 26, 2024 to Jul. 30, 2024 Issue Date: Jul. 30, 2024 Report No.: CTB240730044RFX Test Standards FCC CFR Title 47 Part 15 Subpart C Section 15.247 ANSI C63.10:2013 Test Results PASS Remark: This is Bluetooth radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.:CTB240730044RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 57 TABLE OF CONTENT Test Report Declaration Page 1. VERSION .......................................................................... 4 2. TEST SUMMARY ................................................................... 5 3. MEASUREMENT UNCERTAINTY ..................................................... 6 4. PRODUCT INFORMATION AND TEST SETUP ......................................... 7 4.1 Product Information ................................................................... 7 4.2 Test Setup Configuration ............................................................... 7 4.3 Support Equipment.................................................................... 7 4.4 Channel List ......................................................................... 8 4.5 Test Mode ........................................................................... 8 4.6 Test Environment ..................................................................... 8 5. TEST FACILITY AND TEST INSTRUMENT USED ....................................... 9 5.1 Test Facility .......................................................................... 9 5.2 Test Instrument Used .................................................................. 9 6. AC POWER LINE CONDUCTED EMISSION ............................................ 12 6.1 Block Diagram Of Test Setup .......................................................... 12 6.2 Limit ............................................................................... 12 6.3 Test procedure ...................................................................... 12 6.4 Test Result ......................................................................... 14 7. RADIATED SPURIOUS EMISSION ................................................... 16 7.1 Block Diagram Of Test Setup .......................................................... 16 7.2 Limit ............................................................................... 16 7.3 Test procedure ...................................................................... 17 7.4 Test Result ......................................................................... 18 8. BAND EDGE AND RF COUNDUCTED SPURIOUS EMISSIONS .......................... 27 8.1 Block Diagram Of Test Setup .......................................................... 27 8.2 Limit ............................................................................... 27 8.3 Test procedure ...................................................................... 27 8.4 Test Result ......................................................................... 28 9. COUDUCTED PEAK OUTPUT POWER ............................................... 35 9.1 Block Diagram Of Test Setup .......................................................... 35 9.2 Limit ............................................................................... 35 9.3 Test procedure ...................................................................... 35 9.4 Test Result ......................................................................... 35 10. 20DB OCCUPIED BANDWIDTH ..................................................... 39 10.1 Block Diagram Of Test Setup ......................................................... 39 10.2 Limit .............................................................................. 39 10.3 Test procedure ..................................................................... 39 10.4 Test Result ........................................................................ 39 11. CARRIERFREQUENCIES SEPARATION ............................................. 43 11.1 Block Diagram Of Test Setup ......................................................... 43 11.2 Limit .............................................................................. 43 11.3 Test procedure ..................................................................... 43 11.4 Test Result ........................................................................ 43 12. HOPPING CHANNEL NUMBER ..................................................... 47 12.1 Block Diagram Of Test Setup ......................................................... 47 12.2 Limit .............................................................................. 47 12.3 Te…

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Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 2 Model: MD056 Radiated Emission Below 1G Above 1G Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 2 Conducted emissions