2ARWY-WT09BWireless Transceiver Set

5mm 8 . T y p i c a l A pp l i c a t i o n S ce n a r i o s 1 . H o m e P r a c t i ce / B e d r oo m S e t u p T e c h n i c a l S p ec ifi c a t i on s l d ea l f o r d a i l y r e h e a r sa l o r r e co r d i n g i d eas : · D i r e c t l y p l u g t h e t r an s m i t t e r i n t o y ou r g u i t a r o r b a ss . · K ee p t h e r ece i ve r w i t h i n 3 - 5 m e t e r s f o r o p t i m a l s t a b i l i t y . · U s e c l ea n a m p s e t t i n g s or h ea d p h o n e a m p s f o r l a t e - n i g h t p r ac t i ce . B e ne fi t : N o ca b l e s , n o c l u t t e r , i n s t a n t f r ee d o m o f m o v e m e n t . W i r e l e s s T r a nsce i ver S e t S p ec ifi ca t i o n I t e m M o d e l 2 . C l a s s r oo m / T e a c h i n g E n v i r onmen t F r e q u en c y R an g e 5 . 735 - 5 . 88 1 G H z W T O 9 B i s w e l l s u i t e d f o r m us i c t ea c h e r s , s t u d e n t s , a n d g rou p l ess on s : · A ll ows t h e i n s t ru c t o r t o m o ve f r ee l y w h i l e d e m o ns t r a t i n g t ec h n i q ues . · M a i n t a i n s s t a b l e s i g n a l i n t y p i c a l c l ass roo m s i ze ( 3 - 8 m e t e r s ) . · S u pp o r t s c l ea r t o n e f o r s t u d en t s t o h e a r s u b t l e p l a y i n g d e t a i l s . B ene fi t : E n h a n c e d m o b i l i t y a n d co n s i s t e n t s o u n d q u a l i t y i n e d u ca t i o n a l s p a ce s Maximum ConductedPower: - 3 d B 3.77dBm 2 0 H z - 2 0 k H z () < - 9 4 d B R ece i v e S e n s i t i v i t F r e q u e n c y R e s p o ns e y m 3 . S m a ll C l u b s / W o rs h i p S t a g e s F or s m a ll v e n u e s or c h ur c h e n v i r onm e n t s : · P o s i t i o n t h e rec e i v e r w h e r e l i n e - o f - s i g h t i s c l e a r . · P e r f o r m a q u i c k p re - s er v i ce t es t t o v e r i f y c h a nn e l s t a b i l i t y . · A v o i d p l a c i n g t h e r e c e i v e r b e h i n d m e t a l r a c k s , s p e a k er s , o r p e d a l b o a r d p o we r s u p p l i e s . B e n e fi t : R e l i a b l e w i r e l e ss o p e r a t i o n w i t h n a t u r a l e x p r e s s i v e t o n e T o t a l H a rmo n i c D i s t o r t i on < 0 . 04 % L a t enc y < 5 . 5 m s C h a nne l s 6 u p t o 6 0 m ( 2 00 f t ) T r a n s m i s s i on R a n g e 4 . O u t d oor U se ( S h or t - R a n g e A pp l i c a t i on s ) li ne-o f -s i g h t O u t d oor en v i ronmen t s m a y r e d u ce w i re l e ss ra n g e d u e t o re f l ec t i on s a n d o p en - a i r c on d l i t i on s . S t or a g e C as e D i m en s i o n s A p p r o x . 1 2 7 × 4 0 × 3 7 m m T o o p t i m i z e p e r f o r m a n c e : · K e e p o p e ra t i n g d i s t a nce w i t h i n r e commen d e d r a n g e . · P e r f orm a b r i e f t e s t b e f o r e p e r f o r m i n g . · A v o i d cro w d e d R F e n v i ro n m e n t s a n d c h oo s e l e s s co n g e s t e d c h a n ne l s . B e n e f i t : S t a b l e p e r f o r m a n c e ou t d o o r s w h e n u s e d w i t h i n r a n g e a n d p r o p e r l y t e s t e d ! W e i g h t ( w i t h S t or a g e C a s e ) A pp r o x . 7 6 g C h a r g i n g P or t U S B T yp e - C 5 V = 1 A I n p u t V o l t a g e 5 . R ec o r d i n g / H o me S t u d i o P r o d u c t D i m e n s i o n s WT O 9 B ' s l o w - no i s e a n d h i g h - i m p e d a nce d e s i g n m a k e s i t su i t a b l e f o r t r a c k i n g : · C onnec t t h e r e c e i v e r d i r e c t l y t o a u d i o i n t er f a c e s or D l i n p u t s . · M a i n t a i n g ree n / y e ll o w l eve l s o n t h e A u d i o L e v e l I n d i c a t or f o r c l e a n r ecor d i n g . · E n s ure t h e r o o m h a s m i n i m a l R F i n t e r f erenc e . B en e f i : S t u d i o - g r a d e c l a r t y w i t h o u t s a c n f i c i n g w i r e l e ss co n v e n i e n c e C h a r g i n g T i me A pp r o x . 2 h o u r s O p e r a t i n g T i m e A pp r ox . 4 h o u r s 1 7 1 6 WT09B

SWIFFTECHNOLOGYCO.,LTD. FederalCommunicationsCommission AuthorizationandEvaluationDivision EquipmentAuthorizationBranch 7435OaklandMillsRoad Columbia,MD21046 [2026-05-17] U.S.AgentDesignation [SWIFFTECHNOLOGYCO.,LTD.]acknowledgestheirconsentforthefollowingcontactlocatedintheUnited Statestoactastheiragentforserviceofprocessfortheequipmentforwhichauthorizationissought(FCCID: 2ARWY-WT09B): NameandcompanyofU.S.agent:[GLOCERTSTECHNOLOGYINC] PhysicalU.S.addressofagent:[19784SUNKISSEDRIDGEDR,RIVERSIDE,CA92507] FRNofU.S.agent:[0036339737] EmailaddressofU.S.agent:[[email protected]] TelephoneofU.S.agent:(626)588-8039 [GLOCERTSTECHNOLOGYINC]acknowledgestheirobligationtoacceptserviceofprocessonbehalfof [SWIFFTECHNOLOGYCO.,LTD.]. [SWIFFTECHNOLOGYCO.,LTD.]withtheFRN[0028037091]acceptsitsobligationtomaintainanagentfor serviceofprocessintheUnitedStatesfornolessthan1yearaftereitherthegranteehaspermanentlyterminated allmarketingandimportationoftheapplicableequipmentwithintheU.S.,ortheconclusionofany Commission-relatedadministrativeorjudicialproceedinginvolvingtheequipment,whicheverislater. Bysigningthisform,weconfirmtheaboveandthatweareawareoftheapplicationrequirementslistedunder§ 2.911(d)(7). TheinformationprovidedinthisletterisbasedonthereferencedrulepartsofTitle47oftheCFRaswellasKDB 986446D01. Sincerely, SignatureSignature [AngelaXu][HuiyingFan] [Manager][Director] [SWIFFTECHNOLOGYCO.,LTD.][GLOCERTSTECHNOLOGYINC]

Rev1/26/2023 SWIFFTECHNOLOGYCO.,LTD. FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:05-22-2026 Ref:AttestationStatementsPart2.911(d)(5)(i)Filing FCCID:2ARWY-WT09B SWIFFTECHNOLOGYCO.,LTD.certifiesthattheequipmentforwhichauthorizationissoughtisnot “covered”equipmentprohibitedfromreceivinganequipmentauthorizationpursuanttosection2.903of theFCCrules. SWIFFTECHNOLOGYCO.,LTD.certifiesthattheequipmentforwhichauthorizationissoughtdoesnot includecybersecurityoranti-virussoftwareproducedorprovidedbyKasperskyLab,Inc.oranyofits successorsandassignees,includingequipmentwithintegratedKasperskyLab,Inc.(oranyofits successorsandassignees)cybersecurityoranti-virussoftwarepursuanttoDA-24-886andKDB986446 D01CoveredEquipmentGuidancesectionB(2a). Deviceisinherentlycompliantbasedonhardwarelimitationsorsoftwarecontrols. or ASoftwareBillofMaterials(SBOM)isprovidedtotheTCBforreview,and Theend-userorthirdpartiescannotinstalladditionalsoftwareonthisdevice. Sincerely, AngelaXu Rev1/26/2023 SWIFFTECHNOLOGYCO.,LTD. FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:05-22-2026 Ref:AttestationStatementsPart2.911(d)(5)(ii)Filing FCCID:2ARWY-WT09B SWIFFTECHNOLOGYCO.,LTD.certifiesthat,asofthedateofthefilingoftheapplication,theapplicant isnotidentifiedontheCoveredList(asaspecificallynamedentityoranyofitssubsidiariesoraffiliates) asanentityproducing“covered”equipment. Sincerely, AngelaXu

SWIFFTECHNOLOGYCO.,LTD. Date：2026.05.22 ProductModelNumber:WT09B FCCID ： 2ARWY-WT09B Towhomitmayconcern, Re:ProductCertificationRepresentativeAuthorizationLetter WeauthorizeQAILaboratoriesLtd.3980NorthFraserWay,BurnabyB.C. CanadaV5J5K5toactonourbehalfonallmattersconcerningtheabove namedequipment. Thisshallincludethefollowing: Testing Approvalapplicationsandprocedures WedeclarethatQAILaboratoriesLtd.isallowedtoforwardallinformation relatedtotheapprovalprojecttotheappliedcertificationbodyandtothe notificationentitiesandtodiscussanyissuesconcerningtheapproval application.AnyandallactscarriedoutbyQAILaboratoriesLtd.onour behalfshallhavethesameeffectasactsofourown. By: Title:Manager Email:[email protected] Telephone:18665896581 Onbehalfof:SWIFFTECHNOLOGYCO.,LTD.

SWIFFTECHNOLOGYCO.,LTD. OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USA Date:May23,2026 Subject;RequestforConfidentiality FCCID:2ARWY-WT09B ToWhomItMayConcern, PursuanttotheprovisionsoftheCommission’srulesTitle47Sections§0.457and§0.459,we arerequestingtheCommissiontowithholdthefollowingattachment(s)asconfidential documentsfrompublicdisclosureindefinitely. Thesedocumentscontaindetailedsystemandequipmentdescriptionsandareconsideredas proprietaryinformationinoperationoftheequipment.Thepublicdisclosureofthese documentsmightbeharmfultoourcompanyandwouldgivecompetitorsanunfairadvantage inthemarket. SchematicDiagram BlockDiagram PartsList OperationalDescription Tune-upProcedure SoftwareSecurityRequirementsforUNIIdevices 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:AngelaXu Title:Manager

SWIFFTECHNOLOGYCO.,LTD. FCCSoftwareConfigurationControlDeclaration Date:July9,2026 FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USA Attn:OETDept. Product/ModelNumber:WirelessTransceiverSet/WT09B FCCID:2ARWY-WT09B RegardingFCCCountryCodeSelectionguidelinesidentifiedinKDB594280. “Allapplicationsforequipmentauthorizationfortransmittersthatcanhave radioparameters,orothertechnicalparameters,reportedtotheCommission setbysoftwaremusthaveanattestationindicatingthatnothirdpartywillhave software,orconfigurationcontrol,toprogramthedeviceoutofcomplianceof thetechnicalrulesunderwhichithasbeencertified.” Wedeclarethatnothirdpartywillhavesoftware,orconfigurationcontrol,toprogram thedeviceoutofcomplianceofthetechnicalrulesunderwhichithasbeencertified. Name:AngelaXuDate:July9,2026 Title:Manager Signatureofapplicant ：

Report Number: BTF260311R00601 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 1 of 4 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 Appendix II External Photos Report Number: BTF260311R00601 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 2 of 4 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 Report Number: BTF260311R00601 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 3 of 4 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 Report Number: BTF260311R00601 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 4 of 4 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00

Label&Location LabelsizeL*W:60mm*20mm

Report Number: BTF260311R00601 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 1 of 4 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 Appendix III Internal Photos Report Number: BTF260311R00601 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 2 of 4 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 Report Number: BTF260311R00601 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 3 of 4 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 Report Number: BTF260311R00601 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 4 of 4 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00

Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 1 of 9 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdon g, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 Health Test Report For Applicant name: SWIFF TECHNOLOGY CO., LTD. Address: 5/F, Bullding B, Hengchangrong Industrial Park No.52 Huaning Road. Longhua, Shenzhen, China 518109 EUT name: Wireless Transceiver Set Brand name: SWIFF AUDIO Model number: WT09B Series model number: N/A FCC ID: 2ARWY-WT09B Issued By Company name: BTF Testing Lab (Shenzhen) Co., Ltd. Address: Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Report number: BTF260311R00603 Test standards: 47 CFR Part 2 Subpart J Section 2.1093 Test conclusion: Pass Date of sample receipt: 2026-03-11 Test date: 2026-03-11 to 2026-07-07 Date of issue: 2026-07-07 Prepared by: Approved by: Chris Liu / Project engineer Ryan.CJ /EMC manager Note: All the test results in this report only related to the testing samples. Which can be duplicated completely for the legal use with approval of applicant; it shall not be reproduced except in full without the written approval of BTF Testing Lab (Shenzhen) Co., Ltd., All the objections should be raised within thirty days from the date of issue. To validate the report, you can contact us. Report Number: BTF260311R00603 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 2 of 9 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdon g, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 Revision History Version Issue date Revisions content R_V0 2026-07-07 Original Report Number: BTF260311R00603 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 3 of 9 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdon g, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 Table of Contents 1 Introduction ............................................................................................................................................................... 4 1.1 Laboratory Location .......................................................................................................................................... 4 1.2 Laboratory Facility ............................................................................................................................................ 4 1.3 Announcement ................................................................................................................................................. 4 2 Product Information ................................................................................................................................................. 5 2.1 Application Information ..................................................................................................................................... 5 2.2 Manufacturer Information ................................................................................................................................. 5 2.3 Factory Information .......................................................................................................................................... 5 2.4 General Description of Equipment under Test (EUT) ...................................................................................... 5 2.5 Technical Information ....................................................................................................................................... 5 3 RF Output Power ...................................................................................................................................................... 6 4 Applied Reference Documents ............................................................................................................................... 7 5 RF Exposure Limit .................................................................................................................................................... 7 6 RF Exposure Assessment ....................................................................................................................................... 8 Report Number: BTF260311R00603 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 4 of 9 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdon g, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 1 Introduction 1.1 Laboratory Location Test location: BTF Testing Lab (Shenzhen) Co., Ltd. Address: Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Description: All measurement facilities used to collect the measurement data are located at Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Phone number: +86-0755-23146130 Fax number: +86-0755-23146130 1.2 Laboratory Facility The test facility is recognized, certified, or accredited by the following organizations: ⚫ FCC - Designation No.: CN1409 BTF Testing Lab (Shenzhen) Co., Ltd. has been accredited as a testing laboratory by FCC (Fed…

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1. Duty Cycle 1.1 Test Result 1.1.1 Ant1 Ant1 Mode TX Type Frequency (MHz) T_on (ms) Period (ms) Duty Cycle (%) Duty Cycle Correction Factor (dB) Max. DC Variation (%) GFSK SISO 5735 0.254 0.612 41.50 3.82 38.13 5792 0.253 0.611 41.41 3.83 38.12 5848 0.253 0.612 41.34 3.84 38.16 1.2 Test Graph 1.2.1 Ant1 GFSK_LCH_5735MHz_Ant1_NTNV GFSK_MCH_5792MHz_Ant1_NTNV GFSK_HCH_5848MHz_Ant1_NTNV 2. Bandwidth 2.1 Test Result 2.1.1 OBW Mode TX Type Frequency (MHz) ANT 99% Occupied Bandwidth (MHz) Verdict Result Limit GFSK SISO 5735 1 2.242 / Pass 5792 1 2.241 / Pass 5848 1 2.353 / Pass 2.1.2 6dB BW Mode TX Type Frequency (MHz) ANT 6dB Bandwidth (MHz) Verdict Result Limit GFSK SISO 5735 1 1.243 >=0.5 Pass 5792 1 1.175 >=0.5 Pass 5848 1 1.215 >=0.5 Pass 2.2 Test Graph 2.2.1 OBW GFSK_LCH_5735MHz_Ant1_NTNV GFSK_MCH_5792MHz_Ant1_NTNV GFSK_HCH_5848MHz_Ant1_NTNV 2.2.2 6dB BW GFSK_LCH_5735MHz_Ant1_NTNV GFSK_MCH_5792MHz_Ant1_NTNV GFSK_HCH_5848MHz_Ant1_NTNV 3. Maximum Conducted Output Power 3.1 Test Result 3.1.1 Power Mode TX Type Frequency (MHz) Maximum Average Conducted Output Power (dBm) Verdict ANT1 Limit GFSK SISO 5735 3.21 <=30 Pass 5792 1.86 <=30 Pass 5848 1.02 <=30 Pass Note1: Antenna Gain: - Band: 3 Ant1: 2.75dBi; - Band: 4 Ant1: 2.75dBi; 3.2 Test Graph 3.2.1 Power GFSK_LCH_5735MHz_Ant1_NTNV GFSK_MCH_5792MHz_Ant1_NTNV GFSK_HCH_5848MHz_Ant1_NTNV 4. Maximum Power Spectral Density 4.1 Test Result 4.1.1 PSD-Band3 Mode TX Type Frequency (MHz) Maximum PSD (dBm/500kHz) Verdict ANT1 Limit GFSK SISO 5735 1.70 <=30 Pass 5792 0.32 <=30 Pass 5848 -0.80 <=30 Pass Note1: Antenna Gain: - Band: 3 Ant1: 2.75dBi; - Band: 4 Ant1: 2.75dBi; 4.2 Test Graph 4.2.1 PSD-Band3 GFSK_LCH_5735MHz_Ant1_NTNV GFSK_MCH_5792MHz_Ant1_NTNV GFSK_HCH_5848MHz_Ant1_NTNV 5. Frequency Stability 5.1 Test Result 5.1.1 Ant1 Ant1 Mode TX Type Frequency (MHz) Temperature (°C) Voltage Measured Frequency (MHz) Limit (MHz) Verdict GFSK SISO 5735 20 LV 5734.964 5725 to 5850 Pass NV 5734.964 5725 to 5850 Pass HV 5734.962 5725 to 5850 Pass -30 NV 5734.960 5725 to 5850 Pass -20 NV 5734.960 5725 to 5850 Pass -10 NV 5734.966 5725 to 5850 Pass 0 NV 5734.966 5725 to 5850 Pass 10 NV 5734.968 5725 to 5850 Pass 30 NV 5734.960 5725 to 5850 Pass 40 NV 5734.958 5725 to 5850 Pass 5792 20 LV 5791.988 5725 to 5850 Pass NV 5792.006 5725 to 5850 Pass HV 5791.992 5725 to 5850 Pass -30 NV 5791.996 5725 to 5850 Pass -20 NV 5791.988 5725 to 5850 Pass -10 NV 5791.994 5725 to 5850 Pass 0 NV 5791.984 5725 to 5850 Pass 10 NV 5792.000 5725 to 5850 Pass 30 NV 5791.982 5725 to 5850 Pass 40 NV 5791.984 5725 to 5850 Pass 5848 20 LV 5848.014 5725 to 5850 Pass NV 5848.024 5725 to 5850 Pass HV 5848.014 5725 to 5850 Pass -30 NV 5848.020 5725 to 5850 Pass -20 NV 5848.028 5725 to 5850 Pass -10 NV 5848.020 5725 to 5850 Pass 0 NV 5848.024 5725 to 5850 Pass 10 NV 5848.012 5725 to 5850 Pass 30 NV 5848.018 5725 to 5850 Pass 40 NV 5848.028 5725 to 5850 Pass 6. Band Edge 6.1 Test Result 6.1.1 Band Edge Mode TX Type Frequency (MHz) ANT Level of Unwanted Emissions (dBm) Verdict Result Limit GFSK SISO 5735 1 Refer To Test Graph Pass 5848 1 Refer To Test Graph Pass 6.2 Test Graph 6.2.1 Band Edge GFSK_LCH_5735MHz_Ant1_NTNV GFSK_HCH_5848MHz_Ant1_NTNV

1. Duty Cycle 1.1 Test Result 1.1.1 Ant1 Ant1 Mode TX Type Frequency (MHz) T_on (ms) Period (ms) Duty Cycle (%) Duty Cycle Correction Factor (dB) Max. DC Variation (%) GFSK-1 SISO 5852 0.256 0.612 41.83 3.79 38.44 5866 0.254 0.612 41.50 3.82 38.12 5881 0.253 0.612 41.34 3.84 38.12 1.2 Test Graph 1.2.1 Ant1 GFSK-1_LCH_5852MHz_Ant1_NTNV GFSK-1_MCH_5866MHz_Ant1_NTNV GFSK-1_HCH_5881MHz_Ant1_NTNV 2. Bandwidth 2.1 Test Result 2.1.1 OBW Mode TX Type Frequency (MHz) ANT 99% Occupied Bandwidth (MHz) Verdict Result Limit GFSK-1 SISO 5852 1 2.362 / Pass 5866 1 2.360 / Pass 5881 1 2.413 / Pass 2.1.2 6dB BW Mode TX Type Frequency (MHz) ANT 6dB Bandwidth (MHz) Verdict Result Limit GFSK-1 SISO 5852 1 1.216 >=0.5 Pass 5866 1 1.248 >=0.5 Pass 5881 1 1.393 >=0.5 Pass 2.2 Test Graph 2.2.1 OBW GFSK-1_LCH_5852MHz_Ant1_NTNV GFSK-1_MCH_5866MHz_Ant1_NTNV GFSK-1_HCH_5881MHz_Ant1_NTNV 2.2.2 6dB BW GFSK-1_LCH_5852MHz_Ant1_NTNV GFSK-1_MCH_5866MHz_Ant1_NTNV GFSK-1_HCH_5881MHz_Ant1_NTNV 3. Maximum Conducted Output Power 3.1 Test Result 3.1.1 Power Mode TX Type Frequency (MHz) Maximum Average Conducted Output Power (dBm) EIRP power (dBm) Verdict result Limit result limit GFSK-1 SISO 5852 1.02 <=30 3.77 30 Pass 5866 0.70 <=30 3.45 30 Pass 5881 0.51 <=30 3.26 30 Pass Note: 1. EIRP power=Conducted power + Antenna gain 2. antenna gain is 2.75dBi 3.2 Test Graph 3.2.1 Power GFSK-1_LCH_5852MHz_Ant1_NTNV GFSK-1_MCH_5866MHz_Ant1_NTNV GFSK-1_HCH_5881MHz_Ant1_NTNV 4. Maximum Power Spectral Density 4.1 Test Result 4.1.1 PSD-Band4 Mode TX Type Frequency (MHz) Maximum PSD (dBm/500kHz) Maximum PSD (dBm/MHz) EIRP PSD (dBm/MHz) Verdict result limit GFSK-1 SISO 5852 -0.92 2.09 4.84 14 Pass 5866 -0.98 2.03 4.78 14 Pass 5881 -1.11 1.90 4.65 14 Pass Note: 1. EIRP PSD=Conducted PSD + Antenna gain 2. antenna gain is 2.75dBi 3. PSD(dBm/MHz)=PSD(dBm/500KHz)+10log(1000KHz/500KHz) 4.2 Test Graph 4.2.1 PSD-Band4 GFSK-1_LCH_5852MHz_Ant1_NTNV GFSK-1_MCH_5866MHz_Ant1_NTNV GFSK-1_HCH_5881MHz_Ant1_NTNV 5. Frequency Stability 5.1 Test Result 5.1.1 Ant1 Ant1 Mode TX Type Frequency (MHz) Temperature (°C) Voltage Measured Frequency (MHz) Limit (MHz) Verdict GFSK-1 SISO 5852 20 LV 5852.020 5850 to 5895 Pass NV 5852.018 5850 to 5895 Pass HV 5852.014 5850 to 5895 Pass -30 NV 5852.020 5850 to 5895 Pass -20 NV 5852.024 5850 to 5895 Pass -10 NV 5852.022 5850 to 5895 Pass 0 NV 5852.020 5850 to 5895 Pass 10 NV 5852.010 5850 to 5895 Pass 30 NV 5852.026 5850 to 5895 Pass 40 NV 5852.016 5850 to 5895 Pass 5866 20 LV 5866.002 5850 to 5895 Pass NV 5866.018 5850 to 5895 Pass HV 5866.014 5850 to 5895 Pass -30 NV 5866.014 5850 to 5895 Pass -20 NV 5866.006 5850 to 5895 Pass -10 NV 5866.002 5850 to 5895 Pass 0 NV 5866.016 5850 to 5895 Pass 10 NV 5866.018 5850 to 5895 Pass 30 NV 5866.010 5850 to 5895 Pass 40 NV 5866.016 5850 to 5895 Pass 5881 20 LV 5881.006 5850 to 5895 Pass NV 5880.996 5850 to 5895 Pass HV 5881.006 5850 to 5895 Pass -30 NV 5881.002 5850 to 5895 Pass -20 NV 5881.006 5850 to 5895 Pass -10 NV 5881.006 5850 to 5895 Pass 0 NV 5880.996 5850 to 5895 Pass 10 NV 5881.008 5850 to 5895 Pass 30 NV 5881.010 5850 to 5895 Pass 40 NV 5880.994 5850 to 5895 Pass 6. Band Edge 6.1 Test Result 6.1.1 BandEdge Mode TX Type Frequency (MHz) ANT Level of Unwanted Emissions (dBm) Verdict Result Limit GFSK-1 SISO 5852 1 Refer To Test Graph Pass 5881 1 Refer To Test Graph Pass 6.2 Test Graph 6.2.1 BandEdge GFSK-1_LCH_5852MHz_Ant1_NTNV GFSK-1_HCH_5881MHz_Ant1_NTNV

Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 1 of 38 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-0755-23146130 http://www.btf-lab.com Version: 1/00 RF Test Report For Applicant name: SWIFF TECHNOLOGY CO., LTD. Address: 5/F, Bullding B, Hengchangrong Industrial Park No.52 Huaning Road. Longhua, Shenzhen, China 518109 EUT name: Wireless Transceiver Set Brand name: SWIFF AUDIO Model number: WT09B Series model number: N/A FCC ID: 2ARWY-WT09B Issued By Company name: BTF Testing Lab (Shenzhen) Co., Ltd. Address: Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Report number: BTF260311R00601 Test standards: 47 CFR Part 15E Test conclusion: Pass Date of sample receipt: 2026-03-11 Test date: 2026-03-11 to 2026-07-05 Date of issue: 2026-07-07 Prepared by: Approved by: Chris Liu / Project engineer Ryan.CJ / EMC Manager Note: All the test results in this report only related to the testing samples. Which can be duplicated completely for the legal use with approval of applicant; it shall not be reproduced except in full without the written approval of BTF Testing Lab (Shenzhen) Co., Ltd., All the objections should be raised within thirty days from the date of issue. To validate the report, you can contact us. Report Number: BTF260311R00601 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 2 of 38 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-0755-23146130 http://www.btf-lab.com Version: 1/00 Revision History Version Issue Date Revisions Content R_V0 2026-07-07 Original Note: Once the revision has been made, then previous versions reports are invalid. Report Number: BTF260311R00601 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 3 of 38 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-0755-23146130 http://www.btf-lab.com Version: 1/00 Table of Contents 1 Introduction ........................................................................................................................................................ 4 1.1 Laboratory Location ................................................................................................................................... 4 1.2 Laboratory Facility ...................................................................................................................................... 4 1.3 Announcement ........................................................................................................................................... 4 2 Product Information ........................................................................................................................................... 5 2.1 Application Information .............................................................................................................................. 5 2.2 Manufacturer Information ........................................................................................................................... 5 2.3 Factory Information .................................................................................................................................... 5 2.4 General Description of Equipment under Test (EUT) ................................................................................ 5 2.5 Technical Information ................................................…

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