2BKBV-RCYJ002glasses

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. Warning: changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment The devices has been evaluated to meet general RF exposure requirement the device can be used in portable exposure condition without restriction

C5266091_X24_Ed.2 1/1 Dongguan Rongcheng Acoustic Technology Co., LTD “Attestation Statements” TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 The Commission adopted rules that prohibit equipment authorization for “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List 1 , which is periodically updated. See the Covered List for more details. This Attestation Statement is to confirm that we follow the Section 2.911(d)(5)(i)-(ii) Applicant Company name: Dongguan Rongcheng Acoustic Technology Co., LTD FRN：0035818731 Grantee code: 2BKBV FCC ID: 2BKBV-RCYJ002 Contact Name: Su Fengjiao Address: City Wisdom Valley 3 Building 805-2, No.19 Jinpeng Road, Fenggang Town, Dongguan City Telephone No: 13027941006 Fax No: / Email: [email protected] i. [Dongguan Rongcheng 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. The applicant must sign this certification. [Dongguan Rongcheng Acoustic Technology Co., LTD] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant [is not] (as a specifically named entity or any of its subsidiaries or affiliates) identified on the Covered List as an entity producing “covered” equipment. The applicant must sign this certification. [Dongguan Rongcheng 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 . Date: 2024/08/16 Applicant’s Name: Su Fengjiao Title: Manager Signature 1 The Commission’s Covered List is published by the Public Safety and Homeland Security Bureau and posted on the Commission’s website. This Covered List, which is periodically updated, identifies particular equipment, produced by particular entities, that constitutes “covered” equipment. https://www.fcc.gov/supplychain/coveredlist C5266091_X24_Ed.2 1/1

C5266091_X8_Ed.1 1/1 Letter of Authorization Dongguan Rongcheng Acoustic Technology Co., LTD Company: Dongguan Rongcheng Acoustic Technology Co., LTD Address: City Wisdom Valley 3 Building 805-2, No.19 Jinpeng Road, Fenggang Town, Dongguan City Product Name: glasses Model Number: glasses FCC ID: 2BKBV-RCYJ002 We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Su Fengjiao Date: 2024.08.16 Title: Manager Signature of applicant:

C5266091_X10_Ed.2 1/1 Dongguan Rongcheng Acoustic Technology Co., LTD Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 2024.8.16 Subject: Request for Confidentiality FCC ID: 2BKBV-RCYJ002 To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules (47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. 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 NOTE 1: Long-Term Confidentiality may be permitted under special conditions (See II. LONG-TERM CONFIDENTIALITY, Section 3 of KDB 726920, use last in force) NOTE 2: Short-Term Confidentiality can be requested for a maximum of 180 days from the date of the grant. 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. In case of short-term Confidentiality, the applicant requests the exhibits selected above are withheld from public view for a period of ______ days from the date of the Grant of Equipment Authorization and prior to marketing. 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. C5266091_X10_Ed.2 1/1 Sincerely, Signature: Name: Su Fengjiao Title: Manager 2024.08.16

Page1of3ReportNo.:FCS202408095 Externalphotos Photo1 Photo2 Page2of3ReportNo.:FCS202408095 Photo3 Photo4 Page3of3ReportNo.:FCS202408095 Photo5 Photo6

LabelandLabelLocation FCCID:2BKBV-RCYJ002

3 Internalphotos Photo1 Photo2 3 Photo3 Photo4 PCBANT 3 Photo3

FCCRFExposure EUTDescription:glasses ModelNo.:glasses SeriesModel:N/A FCCID:2BKBV-RCYJ002 Equipmenttype:PortableDevice 1.TestProcedure AccordingtoKDB447498D01GeneralRFExposureGuidancev06 The1-gand10-gSARtestexclusionthresholdsfor100MHzto6GHzattest separationdistances ≤ 50mmaredeterminedby: [(max.powerofchannel,includingtune-uptolerance,mW)/ (min.testseparationdistance,mm)]·[√f(GHz)]≤3.0for1-gSARand≤7.5for10-g extremitySAR, where f(GHz)istheRFchanneltransmitfrequencyinGHz PoweranddistanceareroundedtothenearestmWandmmbefore calculationTheresultisroundedtoonedecimalplaceforcomparison Thetestexclusionsareapplicableonlywhentheminimumtestseparation distanceis ≤ 50mmandfortransmissionfrequenciesbetween100MHzand6GHz. Whentheminimumtestseparationdistanceis<5mm,adistanceof5mmisappliedto determineSARtestexclusion. 2.TestResultofRFExposureEvaluation BT [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparation distance,mm)]·[√f(GHz)]=2.3227/5*√2.480=0.73215≤3.0ThresholdatwhichnoSARrequired isand≤3.0for1-gSAR,Separationdistanceis5mm. Conclusion ： NoSARrequired Mode Channel Freq.(MHz) Maximum Conducted Output Power(PK) AntennaGain (dBi) Antenna gainnumeric Maxtune- uppower (W) GFSK 24023.601.51.410.0022908 24412.741.51.410.0018793 24803.661.51.410.0023227

1: Antenna type:PCBSunken antenna 2: Gain:1.5dB 3: Antenna sizeFigure 1Shown Figure 118.2*5.5mm 5: Antenna efficiency Freq (MHz) Effi （%） Effi (dB) Gain (dBi) 240036.8-4.30.8 241040.3-3.91.3 242040.4-3.81.4 243041.6-3.81.5 244040.5-3.71.4 245040.7-3.71.4 246041.2-3.81.5 247040.0-41.4 248038.0-4.21.1 249035.9-4.50.9 250034-4.70.7 6. Antenna performance Figure 2As shown, the operating frequency band covers the entire2.4G ISM frequency band. 5.5mm Figure 2 7: The gain for 2460MHz is as follows, reaching1.5dBi Figure 3

1 FCCTestReport ReportNo:FCS202408095W01 Issuedfor Applicant: DongguanRongchengAcousticTechnologyCo.,LTD Address: CityWisdomValley3Building805-2,No.19Jinpeng Road,FenggangTown,DongguanCity ProductName:glasses BrandName:N/A ModelName: glasses SeriesModel: N/A FCCID:2BKBV-RCYJ002 IssuedBy:FluxComplianceServiceLaboratory Add:Room105FloorBaohaoTechnologyBuilding1NO.15GongyeWestRoadHi-Tech Industrial,SongshanlakeDongguan Tel:769-27280901Fax:769-27280901http://www.FCS-lab.com Page 2 of41ReportNo.:FCS202408095W01 FluxComplianceServiceLaboratory Room105FloorBaohaoTechnologyBuilding1NO.15GongyeWestRoadHi-TechIndustrial,Song shanlakeDongguan Tel:769-27280901Fax:769-27280901http://www.FCS-lab.com 2 TESTRESULTCERTIFICATION Applicant’sName.........................:DongguanRongchengAcousticTechnologyCo.,LTD Address.........................................: CityWisdomValley3Building805-2,No.19JinpengRoad,Fenggang Town,DongguanCity Manufacture'sName...................:DongguanRongchengAcousticTechnologyCo.,LTD Address.........................................: CityWisdomValley3Building805-2,No.19JinpengRoad,Fenggang Town,DongguanCity ProductDescription ProductName..............................:glasses BrandName..................................:N/A ModelName.................................:glasses SeriesModel.................................:N/A TestStandards.............................:FCCRulesandRegulationsPart15SubpartC,Section247 TestProcedure.............................:ANSIC63.10:2013 ThisdevicedescribedabovehasbeentestedbyFluxComplianceServiceLaboratory,thetestresults showthattheequipmentundertest(EUT)isincompliancewiththeFCCrequirements.Anditis applicableonlytothetestedsampleidentifiedinthereport. Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofFluxCompliance ServiceLaboratory,thisdocumentmaybealteredorrevisedbyFluxComplianceServiceLaboratory, personalonly,andshallbenotedintherevisionofthedocument.. DateofTest .................................. : Date(s)ofperformanceoftests.:August7,2024~August19,2024 DateofIssue ................................. :August19,2024 TestResult .................................... :Pass Testedby: (ScottShen) Reviewedby : (DukeQian) Approvedby: (JackWang) Page 3 of41ReportNo.:FCS202408095W01 FluxComplianceServiceLaboratory Room105FloorBaohaoTechnologyBuilding1NO.15GongyeWestRoadHi-TechIndustrial,Song shanlakeDongguan Tel:769-27280901Fax:769-27280901http://www.FCS-lab.com 3 TableofContentsPage 1.SUMMARYOFTESTRESULTS...........................................................................................6 1.1TESTFACTORY............................................................................................................7 1.2MEASUREMENTUNCERTAINTY.................................................................................7 2.GENERALINFORMATION...................................................................................................8 2.1GENERALDESCRIPTIONOFTHEEUT.......................................................................8 2.2BLOCKDIGRAMSHOWINGTHECONFIGURATIONOFSYSTEMTESTED............10 2.3DESCRIPTIONOFNECESSARYACCESSORIESANDSUPPORTUNITS...............11 2.4EQUIPMENTSLIST.....................................................................................................12 3CONDUCTEDEMISSIONMEASUREMENT........................................................................13 4.20DBBANDWIDTH............................................................................................................17 4.1Limit..............................................................................................................................17 4.2TestProcedure.............................................................................................................17 4.3Testsetup.....................................................................................................................17 4.4Testresults...................................................................................................................17 4.5OriginalTestData.........................................................................................................18 5.CONDUCTEDOUTPUTPOWER........................................................................................19 5.1LIMIT............................................................................................................................19 5.3TESTSETUP...............................................................................................................19 5.5TESTRESULTS...........................................................................................................19 6NUMBEROFHOPPINGCHANNEL....................................................................................20 6.1LIMIT............................................................................................................................20 6.2TESTPROCEDURE.....................................................................................................20 5.3TESTSETUP...............................................................................................................20 6.4EUTOPERATIONCONDITIONS.................................................................................20 6.5TESTRESULTS...........................................................................................................21 7.BANDEDGEANDSPURIOUS(CONDUCTED)..................................................................22 7.1LIMIT............................................................................................................................22 7.2TESTPROCEDURE.....................................................................................................22 7.3TESTSETUP...............................................................................................................22 7.4TESTRESULTS...........................................................................................…

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