N7KB18LBluetooth Speaker

KINGTATECHNOLOGYCO.,LTD 2.911(d)(5)(i)EquipmentTypeAttestationv1.2 Section2.911(d)(5)(i)Certification–EquipmentType Companyname:KINGTATECHNOLOGYCO.,LTD Address:Floor2,Building10/Floor4,Building9,Futingindustrialzone,Zhucun,Guanlan,Longhua, Shenzhen,China ProductName:BluetoothSpeaker FCCID:N7KB18L Model(s):HEYSONGBUBBLE,B18L 2.911(d)(5)(i)EquipmentType We,[KINGTATECHNOLOGYCO.,LTD](“theapplicant”)certifythattheequipmentforwhich authorizationissoughtthroughcertificationisnot:  Prohibitedfromreceivinganequipmentauthorizationpursuantto§2.903;oftheFCCrules.  Identifiedasanequipmenttypeinthe“CoveredList” NOTE1 Yourssincerely, Name:MarcoPanDate:Dec.10,2025 Title:Manager Companyname:KINGTATECHNOLOGYCO.,LTD Signature: NOTE1 “CoveredList”;istheListofEquipmentandServicesCoveredBySection2ofTheSecureNetworksAct,availableat https://www.fcc.gov/supplychain/coveredlist References; 1)986446D01CoveredEquipmentv01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2)FederalRegisterdocument2022-28263publishedon02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

KINGTATECHNOLOGYCO.,LTD 2.911(d)(5)(ii)ApplicantAttestationv1.3 Section2.911(d)(5)(ii)Certification–Applicant(CoveredList) Companyname:KINGTATECHNOLOGYCO.,LTD Address:Floor2,Building10/Floor4,Building9,Futingindustrialzone,Zhucun,Guanlan,Longhua, Shenzhen,China ProductName:BluetoothSpeaker FCCID:N7KB18L Model(s):HEYSONGBUBBLE,B18L 2.911(d)(5)(ii)Applicantfiling We,[KINGTATECHNOLOGYCO.,LTD](“theapplicant”)certifythat,asofthedateofthefilingofthe application,theapplicantisnotidentified NOTE1 onthe“CoveredList” NOTE2 ,establishedpursuantto §1.50002ofthischapter,asanentityproducingcoveredcommunicationsequipment. Yourssincerely, Name:MarcoPanDate:Dec.10,2025 Title:Manager Companyname:KINGTATECHNOLOGYCO.,LTD Signature: NOTE1 Deleteoptionnotapplicabletothisapplication. NOTE2 “CoveredList”;istheListofEquipmentandServicesCoveredBySection2ofTheSecureNetworksAct,availableat https://www.fcc.gov/supplychain/coveredlist References; 1)986446D01CoveredEquipmentv01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2)FederalRegisterdocument2022-28263publishedon02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

KINGTATECHNOLOGYCO.,LTD 2.911(d)(7)USAAgentv1.3 Section2.911(d)(7)USAAgentforServiceofProcess Companyname:KINGTATECHNOLOGYCO.,LTD Address:Floor2,Building10/Floor4,Building9,Futingindustrialzone,Zhucun, Guanlan,Longhua,Shenzhen,China ProductName:BluetoothSpeaker FCCID:N7KB18L Model(s):HEYSONGBUBBLE,B18L 2.911(d)(7)USADesignatedAgentforServiceofProcess We,[KINGTATECHNOLOGYCO.,LTD](“theapplicant”)designate[TudocInc.] NOTE1 forthepurposeofacceptingserviceofprocessonbehalfoftheapplicant. Applicantconsent:WeAcknowledgeourconsenttoacceptserviceofprocessinthe UnitedStatesformattersrelatedtotheapplicableequipment,andatthephysicalU.S. addressandemailaddressofthedesignatedagentandacknowledgeour acceptanceofourobligationtomaintainanagentforserviceofprocessintheUnited Statesfornolessthanoneyearaftereitherthegranteehaspermanentlyterminated allmarketingandimportationoftheapplicableequipmentwithintheU.S.,orthe conclusionofanyCommission-relatedadministrativeorjudicialproceedinginvolving theequipment,whicheverislater. Agentobligation:WeAcknowledgeourobligationtoacceptserviceofprocessinthe UnitedStatesformattersrelatedtotheapplicableequipmentatourphysicalU.S. addressandemailaddressfornolessthanoneyearaftereitherthegranteehas permanentlyterminatedallmarketingandimportationoftheapplicableequipment withintheU.S.,ortheconclusionofanyCommission-relatedadministrativeorjudicial proceedinginvolvingtheequipment,whicheverislater. KINGTATECHNOLOGYCO.,LTD 2.911(d)(7)USAAgentv1.3 USAAgent Companyname:TudocInc. Address:16625FlintHollowPlCHINO HILLS91709CAUS FCCRegistrationNumber(FRN): 0037759784 ContactName:TaoXu TelephoneNo:9092874298 Email:[email protected] Applicant Companyname:KINGTATECHNOLOGY CO.,LTD Address:Floor2,Building10/Floor4, Building9,Futingindustrialzone,Zhucun, Guanlan,Longhua,Shenzhen,China FCCRegistrationNumber(FRN): 0021736640 FCCGranteeCode:N7K ContactName:MarcoPan TelephoneNo:86-755-26007050 Email:[email protected] Signature: Title:SalesManager Signature: Title:Manager Date:Dec.10,2025Date:Dec.10,2025 NOTE1:AnapplicantlocatedintheUnitedStatesmaydesignateitselfastheagentforservice ofprocess. Reference;FederalRegisterdocument2022-28263publishedon02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national- security-threats-to-the-communications-supply-chain-through-the

KINGTATECHNOLOGYCO.,LTD AgentAuthorization Company: KINGTATECHNOLOGYCO.,LTD Address: Floor2,Building10/Floor4,Building9,Futingindustrialzone,Zhucun,Guanlan,Longhua, Shenzhen,China ProductName:BluetoothSpeaker ModelNumber(s):HEYSONGBUBBLE,B18L ProductDescription: BluetoothSpeaker WeauthorizeMiCOMLabsInc.,575BoulderCourt,Pleasanton,California94566,USA,to actonourbehalfonallmattersconcerningthecertificationofabovenamedequipment. WedeclarethatMiCOMLabsInc.isallowedtoforwardallinformationrelatedtotheapproval andcertificationofequipmenttotheregulatoryagenciesasrequiredandtodiscussany issuesconcerningtheapprovalapplication.AnyandallactscarriedoutbyMiCOMLabson ourbehalfshallhavethesameeffectasactsofourown. Signature:Date: Dec.10,2025 Name: MarcoPan Title: Manager Company: KINGTATECHNOLOGYCO.,LTD

KINGTATECHNOLOGYCO.,LTD OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USA Date:Dec.10,2025 Subject;RequestforConfidentiality FCCID:N7KB18L ToWhomItMayConcern, PursuanttotheprovisionsoftheCommission’srulesTitle47Sections§0.457and§0.459,we arerequestingtheCommissiontowithholdthefollowingattachment(s)asconfidential documentsfrompublicdisclosureindefinitely. Thesedocumentscontaindetailedsystemandequipmentdescriptionsandareconsideredas proprietaryinformationinoperationoftheequipment.Thepublicdisclosureofthesedocuments mightbeharmfultoourcompanyandwouldgivecompetitorsanunfairadvantageinthemarket. SchematicDiagram BlockDiagram PartsList OperationalDescription Tune-upProcedure Inadditionaltoabovementioneddocuments,inordertocomplywiththemarketingregulations inTitle47CFR§2.803andtheimportationrulesinTitle47CFR§2.1204,whileensuringthat businesssensitiveinformationremainsconfidentialuntiltheactualmarketingofnewly authorizeddevices,werequestShortTermConfidentialityofthefollowingattachment(s); ExternalPhotos TestSetupPhotos InternalPhotos UserManual For45days,pursuanttoPublicNoticeDA04-1705. OR For180dayspursuanttoKDB726920D01. Itisourunderstandingthatallmeasurementtestreports,FCCIDlabelformatand correspondenceduringthecertificationreviewprocesscannotbegrantedasconfidential documentsandthisinformationwillbeavailableforpublicreviewoncethegrantofequipment authorizationisissued. Sincerely, Signature: Name:MarcoPan Title:Manager

KINGTATECHNOLOGYCO.,LTD ModelDifferenceDeclaration ToWhomItMayConcern, We,KINGTATECHNOLOGYCO.,LTD(BluetoothSpeaker);TradeMark:HEYSONG,ModelNumber: HEYSONGBUBBLE,B18L;Allmodel’sthefunction,softwareandelectriccircuitarethesame,only withaproductmodelnameddifferent. Testsamplemodel:HEYSONGBUBBLE. Pleasecontactmeifyouhaveanyquestion. Signature:Date: Dec.10,2025 Name:MarcoPan Title: Manager

FCC ID LABEL: Ca. 30mm x 35mm Label Location FCC ID: N7KB18L

FCC RF Exposure EUT Description: Bluetooth Speaker Model No.: HEYSONG BUBBLE FCC ID: N7KB18L 1. Limits According to KDB 447498 D01 General RF Exposure Guidance v06 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: Result=P/D*√F F= the RF channel transmit frequency in GHz P= Maximum turn‐up power in mw D= Min. test separation distance in mm 2. Test Result of RF Exposure Evaluation Frequency (MHz) Output power (dBm) Tune Up Power (dBm) Max Tune Up power (mW) Min test separation distance (mm) ResultLimit SAR Test Exclusion 2402 1.04 1±1(2) 1.585 5 0.4913.0 Pass Note: PK Output power= conducted power. Conducted power see the test report HK2510215734-E, antenna gain=1.7dBi Per KDB 447498 D0 1, when the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine RF Exposure test exclusion. The test exclusion threshold is 0.491 which is ≤ 3, RF Exposure testing is not required. Note: Exclusion Thresholds Results=[(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ·[√f (GHz)] f(GHz) is the RF channel transmit frequency in GHz Distance=5mm

1 Company: KINGTA TECHNOLOGY CO.,LTD Address:Floor 2,Building 10/Floor 4,Building 9,Futing industrial zone ,Zhucun, Model:B18P Guanlan,Longhua,Shenzhen,china 2 4 4

Page 1 of 53 Report No.: HK2510215734-E FCC Test Report Test Report On Behalf of KINGTA TECHNOLOGY CO., LTD For Bluetooth Speaker Model No.: HEYSONG BUBBLE, B18L FCC ID: N7KB18L Prepared For: KINGTA TECHNOLOGY CO., LTD Floor 2,Building 10/ Floor 4, Building 9, Futing industrial zone, Zhucun, Guanlan, Longhua, Shenzhen, China Prepared By: Shenzhen HUAK Testing Technology Co., Ltd. 1-2/F., Building B2, Junfeng Zhongcheng Zhizao Innovation Park, Heping, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Date of Test: Oct. 21, 2025 ~ Nov. 18, 2025 Date of Report: Nov. 18, 2025 Report Number: HK2510215734-E Page 2 of 53 Report No.: HK2510215734-E Test Result Certification Applicant’s Name .................. : KINGTA TECHNOLOGY CO., LTD Address .................................. : Floor 2,Building 10/ Floor 4, Building 9, Futing industrial zone, Zhucun, Guanlan, Longhua, Shenzhen, China Manufacturer's Name ........... : KINGTA TECHNOLOGY CO., LTD Address .................................. : Floor 2,Building 10/ Floor 4, Building 9, Futing industrial zone, Zhucun, Guanlan, Longhua, Shenzhen, China Product Description Trade Mark ............................. : HEYSONG Product Name ......................... : Bluetooth Speaker Model and/or Type Reference : HEYSONG BUBBLE, B18L Standards .............................. : 47 CFR FCC Part 15 Subpart C 15.247 This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen HUAK Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HUAK Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Date of Test ............................................ : Date (s) of Performance of Tests ............ : Oct. 21, 2025 ~ Nov. 18, 2025 Date of Issue ........................................... : Nov. 18, 2025 Test Result ............................................... : Pass Testing Engineer Len Liao Technical Manager Sliver Wan Authorized Signatory Jason Zhou Page 3 of 53 Report No.: HK2510215734-E Table of Contents Page 1. Summary ............................................................................................................. 5 1.1 Test Standards ............................................................................................................................ 5 1.2 Test Description .......................................................................................................................... 5 1.3 Information of the Test Laboratory ............................................................................................ 6 1.4 Statement of the Measurement Uncertainty ............................................................................. 6 2. General Information ............................................................................................. 7 2.1 Environmental Conditions .......................................................................................................... 7 2.2 General Description of EUT ........................................................................................................ 7 2.3 Description of Test Modes and Test Frequency .......................................................................... 8 2.4 Equipments Used during the Test ............................................................................................... 9 2.5 Related Submittal(s) / Grant (s) ................................................................................................ 10 2.6 Modifications ............................................................................................................................ 10 2.7 Description of Test Setup .......................................................................................................... 10 2.8 Description of Support Units .................................................................................................... 11 3. Test Conditions and Results ................................................................................ 12 3.1 AC Conducted Emissions Test ................................................................................................... 12 3.2 Radiated Emissions and Band Edge .......................................................................................... 15 3.3 Maximum Peak Conducted Output Power ............................................................................... 26 3.4 20dB Bandwidth ....................................................................................................................... 27 3.5 Frequency Separation ............................................................................................................... 31 3.6 Number of Hopping Frequency ................................................................................................ 33 3.7 Time of Occupancy (Dwell Time) ............................................................................................. 35 3.8 Out‐of‐Band Emissions ............................................................................................................. 39 3.9 Pseudorandom Frequency Hopping Sequence ........................................................................ 49 3.10 Antenna Requirement .............................................................................................................. 50 4. Test Setup Photos of the EUT ............................................................................. 51 5. Photos of the EUT .............................................................................................. 53 Page 4 of 53 Report No.: HK2510215734-E ** Modified History ** Revision Description Issued Date Remark Revision 1.0 Initial Test Report Release Nov. 18, 2025 Jason Zhou Page 5 of 53 Report No.: HK2510215734…

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Page 39 of 53 Report No.: HK2510215734-E 3.8 Out-of-Band Emissions Limit In any 100 kHz bandwidth outside the frequency band in which the spread spectrum or digitally modulated intentional radiator is operating, the radio frequency power that is produced by the intentional radiator shall be at least 20 dB below that in the 100 kHz bandwidth within the band that contains the highest level of the desired power, based on either an RF con-ducted or a radiated measurement, pro-vided the transmitter demonstrates compliance with the peak conducted power limits. If the transmitter com-plies with the conducted power limits based on the use of RMS averaging over a time interval, as permitted under paragraph (b)(3) of this section, the attenuation required under this paragraph shall be 30 dB instead of 20 dB. Attenuation below the general limits specified in §15.209(a) is not required. Test Procedure Connect the transmitter output to spectrum analyzer using a low loss RF cable, and set the spectrum analyzer to RBW=100 kHz, VBW= 300 kHz, peak detector , and max hold. Measurements utilizing these setting are made of the in-band reference level, band edge and out-of-band emissions. Test Configuration EUT SPECTRUM ANALYZER Test Results Remark: The measurement frequency range is from 30MHz to the 10th harmonic of the fundamental frequency. The lowest, middle and highest channels are tested to verify the spurious emissions and bandage measurement data. We measured all conditions (DH1, DH3, DH5) and recorded worst case at DH5 and 3DH5 Test plot as follows: Page 40 of 53 Report No.: HK2510215734-E GFSK CH00 CH39 Page 41 of 53 Report No.: HK2510215734-E CH78 Page 42 of 53 Report No.: HK2510215734-E Left Band edge hoping off Right Band edge hoping off Left Band edge hoping on Right Band edge hoping on Page 43 of 53 Report No.: HK2510215734-E π/4DQPSK CH00 CH39 Page 44 of 53 Report No.: HK2510215734-E CH78 Page 45 of 53 Report No.: HK2510215734-E Left Band edge hoping off Right Band edge hoping off Left Band edge hoping on Right Band edge hoping on Page 46 of 53 Report No.: HK2510215734-E 8DPSK CH00 CH39 Page 47 of 53 Report No.: HK2510215734-E CH78 Page 48 of 53 Report No.: HK2510215734-E Left Band edge hoping off Right Band edge hoping off Left Band edge hoping on Right Band edge hoping on Page 49 of 53 Report No.: HK2510215734-E 3.9 Pseudorandom Frequency Hopping Sequence Test Applicable For 47 CFR Part 15C section 15.247 (a) (1): Frequency hopping systems shall have hopping channel carrier frequencies separated by a minimum of 25 kHz or the 20 dB bandwidth of the hop-ping channel, whichever is greater. Alternatively, frequency hopping systems operating in the 2400–2483.5 MHz band may have hopping channel carrier frequencies that are separated by 25 kHz or two-thirds of the 20 dB bandwidth of the hopping channel, whichever is greater, provided the systems operate with an output power no greater than 125 mW. The system shall hop to channel frequencies that are selected at the system hopping rate from a pseudo randomly ordered list of hopping frequencies. Each frequency must be used equally on the average by each transmitter. The system receivers shall have input bandwidths that match the hop-ping channel bandwidths of their corresponding transmitters and shall shift frequencies in synchronization with the transmitted signals. EUT Pseudorandom Frequency Hopping Sequence Requirement The pseudorandom frequency hopping sequence may be generated in a nice-stage shift register whose 5 th and 9 th stage outputs are added in a modulo-two addition stage. And the result is fed back to the input of the first stage. The sequence begins with the first one of 9 consecutive ones, for example: the shift register is initialized with nine ones. ● Number of shift register stages:9 ● Length of pseudo-random sequence:2 9 -1=511 bits ● Longest sequence of zeros:8(non-inverted signal) An example of pseudorandom frequency hopping sequence as follows: Each frequency used equally one the average by each transmitter. The system receiver have input bandwidths that match the hopping channel bandwidths of their corresponding transmitter and shift frequencies in synchronization with the transmitted signals. Page 50 of 53 Report No.: HK2510215734-E 3.10 Antenna Requirement Standard Applicable For intentional device, according to FCC 47 CFR Section 15.203, an intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. And according to FCC 47 CFR Section 15.247, if transmitting antennas of directional gain greater than 6dBi are used, the power shall be reduced by the amount in dB that the directional gain of the antenna exceeds 6dBi. Refer to Statement Below for Compliance. The manufacturer may design the unit so that the user can replace a broken antenna, but the use of a standard antenna jack or electrical connector is prohibited. Further, this requirement does not apply to intentional radiators that must be professionally installed. Antenna Connected Construction The antenna used in this product is a PCB Antenna, is a permanently attached antenna on the PCB. It conforms to the standard requirements. The directional gains of antenna used for transmitting is 1.7dBi. Antenna Page 51 of 53 Report No.: HK2510215734-E 4. Test Setup Photos of the EUT Radiated Emission Page 52 of 53 Report No.: HK2510215734-E AC Conducted Emission RF Conducted Emission Page 53 of 53 Report No.: HK2510215734-E 5. Photos of the EUT Reference to the report: ANNEX A of External photos and ANNEX B of Internal photos ---------End of test report---------

Test Model：HEYSONG BUBBLE Radiated Emission AC Conducted Emission RF Conducted Emission