2AYJ7CHE-633cheero Wireless Transmitter and Receiver

CHEERO WIRELESS TRANSMITTER AND RECEIVER ／、 cheero 〈 口 《3 USER MANUAL 4. Then. CHEERO TRANSMITTER is paired with tlMl Bluetooth h回dphon目。r two Bluetooth speake目simultan四usly. 4.3 DISCONNECT THE CURRENT CONNECT！。N wt回nCHEERO TRANSMITTER is oonnecta:l 1D。闹。rW四Bluetc田th headphon画。rBluetooths田a陆rs.l。ngpress the • 0 • button for 3 seconds to disconnect the cur用同td田ices.Then, it en国陌pairing mode with the gr,;帽nindi回回rlight flashing quickly. Note:1rs阿只:ommendedto turn。仔thecur陪ntheadphone paired v叫th CHEERO TRANSMITTER when )'DU need to connect CH EERO TRANSMITTER to a new。ne. 4.4VOLUME c。NTR。L Mulrilt1.Jnm11酷Shortpress the Mu阳阳nctionbutto凡 VOiume Up: Long p阻挡or short P陪笛the•囚·but国n Voluma由阳、Lo咱pressor short p『'95Sthe·曰 ’ 国阳n Note自In t用nsmltmode.甘、e volun回国n't be control陆dvia CHEER。 TRANSMITTER when it's con nee国dvia the 。pticalpor t 5. RECEIVE M。DE To en恒，R田:eivemode. tum the寸X/RX" switch国 － RX' position. Conn配t CHEER。TRANSMITTERto a non-Bluetooth sp田陆r.car s国用。or ／凶 SPECIFICATI。NS Bluetooth V恒阳I 。nBTS.O Product Model CHE-633 Bluetooth Rar唱e lOm Bluetooth Protocol A2DP/AVRCP V阳rkir唱Current 三23 IT晌 worklr可VO比age DC5V Frequency Range 2.402 CHz-2.480GHz Codecs Aptx-11 Aptx MC SBC Connection Method: Digital。pticalT。SLINKor 3.SmmAux /01 h国dphoneetc. via a 3.Smm audio田ble.Then.回irCHEERO TRANSMITTER to a Bluetoo伽－enablesmartphone etc. via Bluetc阳出，The mu副C骨。m)'DUr phone will be t用nsm1ttedto a spea阳er.car s幅阿捕。r headph町、eetc. RX- 口 小 lu 叩 h [fil 叫 PDIF O町 国 SIT回n Ph。『胃 �p由回于B国 l �etooth 5.1 CONNECTl。NTO。NESMARTPH。NE 1阳，世回nmu且闰IrCHEERO TRANSMITTER to a smartph。neoro吐町 smart d嗣但眉目f\er 3.5mm audio or opti田lcable ocnnec恒d. 2. CHEERO TRANSMITTER will阳帽阳lrlr唱moded l rect!ywlth a blue indicator light由自由ingquickly after it回到帽用。n (or en恒’pairir唱m。deby short p幅画Ingth旷日 ＂ bu田n l. 3. Enable BIU9'恼。由。nyour田nartphone.search "CH EERO TRANSMITTER" 画，回click to a,nnect. When甘曹a,nn,副：ioni5 complete. the blue ir回国阳 I l g ht a司倍。n 4. En恒，thecode 飞 泪。旷ifn回d回． /07 DIAGRAM 『＝�rfi l. Multifunction日utton:Power On I Off.同町／Pause 2. N田tTrack I Vo l ume Up 3. PN酬。usTrack /VOiume D曲”、 4. Bluetooth Function But国n 5. S国tuslndic,r恒，Light 6. use Charging问而 7. AUX Port队uxs阳哩。InputI Output p。由｝ a SPDIFIN：。回国linput portσ'X: Input from TV) 9. SPDIF。UT： φ 。ptl臼loutp,.』tport(R元。utput阳Sp嗣陆r) 10.阳（recel耐／TX（恤nsmltlSWI蛐 l l. SPDIF / AUX SwitI:h (o回国l audio/AUX归回audioswitch] 5.2C。NNECTI。NτOTW。SMARTPH。NES ／口2 l.Mer c。mple回ngthe connection to the青团tsmartphone ， 由。同press伽e -0 · button to回国rPairing mode with the blue indica田，light何面hing quickly (the first smartpho帽臼n且ill w。由normallyf. 2. Enable Bluetooth on the且,condsmartph。ne.search "CH EERO TRANSMITTER" and click to c。nnecl 3.When由econnec目。n国由＠跑回ndsmartphone Is comp l 9国. the b l ue ir回l咀国r l ight st,柄。n.Then. two smartphon田wi ll be connected to CHEER。TRANSMITTERsimul国ne。usly. Nott民Ifyou want to change the music困山田from由e何时回回而phoneto tt回事econdsmartphone. Pause the n陌t SIT、artphone.then �u can play music。n the辑!COndsma民ph。ne捕前5secor回s. 5.3 DISCONNECT THE CURRENT CONNECTION T。 disconnect甘回currentc。nnect,onar回connectto other smartphones. Ion目P阳岛the ’ 因· button for耳目a>nds-CHEEROTRANSMITTER will dlsconn缸tthe回忖回SIT回陀phoneand en国rpairing mode with the blue lndl回国川lght flashing qulckly. No悔 l fyoune回回conn民tCHEERO TRANSMITTER幅an酬。ne, 酬easedisable B l uetooth。n the pal帽dSI响artphone. /08 L。1WLATENCY FUNCTI。N INSTRUCTIONS 目。由Bluetc田thRX mode and Bluetoo由TX mode曲”割肉抽眈ap民m 阳N国国ncy(APTX LL) or ap白＜™(APTX). Tips: If阴阳呐眉ntto use CHEER。TRANSMITTER's Af>TX LL or APT)( function, TX Transmit Mode: Your Blu由X>thheadphone or日luetooths阻akeret巳 should supp。rtAf>TX LL or APTX. RXRe四lwMode: Your Bluetoo阶－e阳biasπ回民ph。ne e忆st回uld 剧pp。而APTXLL 。rAPTX. lfy。u帆眉ntto四perlen国Af>TXU.。rAPTχ阳nc甘。nw1廿l tv.o d时帽s connec恒d国CHEER。TRANSMITTER.both d町icesshould suppoπ APlX LL or APTX. 1问WERON f闻WEROFF R四”町。”：Long p阳s.sthe Multl·阳nctlonbutton for 3 sec。nds.CHEERO TRANSMITTER wi l l pa响ronau国阿回国国 ll y回tha g酷刑ndi回国， l ight H刻 。r blueindia舶rl国ht l以）fl田hing. P四，－o慨Lor咽 P 用画 the Mui国阳ncti。n button for 3 seconds. 2 . TX／阻M。DESWITCH Convert via the寸X/RX'酬 i tch ／口3 5.4 PLAY MUSIC P l ay/Pau蜡Sho吐pre画theMui回仙nctlonbutton . N回T四川hortp晦阳•l]•bu忧。n 同时OU5TI用ck:Shortpr睡the-a·bu阳n. VOiume Up, Lo咽 P 『四the·o-button. Volume阮,wn,Long p『四the·D·国国n 6. BLUETOOTH AUTOMATIC REC。NNECTI。N 6.1 B l uett田thconnection wi ll be d1sconnec恒dwhen the distance 'INia'J from CH EERO TRANSMITTER 四卫国s甘回Bluett田th用ngeor CHEERO TRANSMITTER P曲Ne阳。何 ． 6.2Wh田、the dis国nee＝司Y H咽mCHEERO TRANSMITTER Is within tt回 Bluetooth阳ngeorCHEER。TRANSMITTERP由闹阳。n啕a l n. CHEERO TRANSMITTER will en恤，陪connectionm田Je:the blue indicator light刊苗h国quickly(RX）。rgreen indicator light帽苗h白布t In国n眉IOX) . Then, the 1'M> d剧团植paJNidbefo阳thed l sccnnec目。nwi ll be阻connect<到dwith CHEEROTRANSMITTER 6.3 CHEERO TRANSMITTER will automatically en国rpairing m。de when the reconnection臼ntbecomple田in l口seconds.Also. yo u 臼n short p阳岛the ＂ 因·button回回国rpairi咱modemanually within these 10 secorids. /09 T来日luetoothtransmit mode RX:Blue阳th阳回惘m创e 3. SPDIF I AUX swrrcH 臼nvertvia the "SPDIF I AUX" switch SPDIF:。pticaldigi国taudio SPI到FIN:opti田l input port (TX Input from lV). SPDIFOlπ·opt ＇ 国IOUt _P Ut port (RX: 0咀putto Spea陆r� AUX:. S恒『回analogueaudio 4. TRANSMIT M。DE T。enterTi阳nsmit m。de.tum the寸X／眩 ’ 则itchto the寸）（＂pos阁。n connect CH EERO TRANSMITTER国anon-Bluetooth mult忖响edla d田i四(suchas TV, PC）咽a a 3.Smm audio cable。r 。pti田l田ble.Then, the audio source from a multirT百id1adevice (such as TV, PC］国nba t用nsmit国dto a Bluetooth headph。r晤。rBlue田。ths口回陆rvia CHEERO TRANSMITTER ’ S Bluetooth t田nsmission, 9� .. ，.由＞））·－日！ 7. CLEAR BLUETOOTH PAIRING L障T In poy帽r唱ns回国.to clear the pairing list paired国forearid en悟rpairing mode. long press the － 囚· button for B s目。ndsuntil the red indi回国rlight flash届twi臼口he pairing Ii.且由陆beclear回in p四11111,-0怦且a国l No恤InBlu91coth自ocelllemode.p恒a画c l 回rpairing l国tony。ur smartphone slmul国n回uslyto陪conn田tquickly. 8.L。W POWER PR,。MPT When the bat悟，y画in low power, CHEERO TRANSMITTER'S indicator l国htwlll自由hr回quickly.If the阳削erls阳o…

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TRA COMPANY LTD. 2021.02.26 Eurofins MET Labs 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR EUT NAME: cheero Wireless Transmitter and Receiver Trademark: Cheero FCC ID: 2AYJ7CHE-633 MODEL : CHE-633, CHS-001, CHS-002 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 - Block Diagram - Schematics - Operational Description required to be submitted with this application be permanently withheld from public review. The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. Please contact me if there is any information you may need. Sincerely, Client’s signature: Client’s name / title : Wiktor Fronczak/Manager Contact information / address: Osaka-shi, Chuo-ku, Kitahama-higashi 6-6, 540-0031 Japan

TRA COMPANY LTD. 2021.02.26 Eurofins MET Labs 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen BCTC Testing 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, Client’s signature: Client’s name / title : Wiktor Fronczak/Manager Contact information / address: Osaka-shi, Chuo-ku, Kitahama-higashi 6-6, 540-0031 Japan

TRA COMPANY LTD. Model Difference 2021-02-26 EUT NAME: cheero Wireless Transmitter and Receiver Trademark: Cheero MODEL : CHE-633, CHS-001, CHS-002 All the model are the same circuit and RF module, except model names. Regards Sincerely Client’s signature: Client’s name / title : Wiktor Fronczak /Manager Contact information / address: Osaka-shi, Chuo-ku, Kitahama-higashi 6-6, 540- 0031 Japan

External Photos

Size:40*20mm FCC ID: 2AYJ7CHE-633 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 interfer ence, and (2) this device must accept any interference received, including interference that may cause undesired operation. Label Location

Internal Photos Antenna

Shenzhen BCTC Testing Co., Ltd. FCC ID: 2AYJ7CHE-633 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 GFSK2.441-4.8690.33-5±1-4.000.40<50.124403.00YES Pi/4 DQPSK 2.402-5.5480.28-5±1-4.000.40<50.123403.00YES 8DPSK2.402-5.4070.29-5±1-4.000.40<50.123403.00YES Conclusion: For the max result : 0.12440＜3.0, the SAR testing is not required.

No.：BCTC/RF-EMC-005 Page: 1 of 70 Edition：A.3 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2012959876E Applicant: TRA COMPANY LTD. Product Name: cheero Wireless Transmitter and Receiver Model/Type Ref.: CHE-633 Tested Date: 2020-12-25 to 2021-01-07 Issued Date: 2021-01-08 Report No.: BCTC2012959876E No.：BCTC/RF-EMC-005 Page: 2 of 70 Edition：A.3 FCC ID: 2AYJ7CHE-633 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: cheero Wireless Transmitter and Receiver Trademark: Cheero Model/Type Ref.: CHE-633 CHS-001, CHS-002 Prepared For: TRA COMPANY LTD. Address: Osaka-shi, Chuo-ku, Kitahama-higashi 6-6, 540-0031 Japan Manufacturer: Shenzhen I-Link Technology CO., LTD Address: Unit B, 2 nd Floor, Building 1, Xifa District C, Yintian Industrial Park, Xixiang Street, Baoan District, Shenzhen, 518102 Prepared By: Shenzhen BCTC Testing Co., Ltd. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Tangwei, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: 2020-12-25 Sample tested Date: 2020-12-25 to 2021-01-07 Issue Date: 2021-01-08 Report No.: BCTC2012959876E 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.: BCTC2012959876E No.：BCTC/RF-EMC-005 Page: 3 of 70 Edition：A.3 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 ..................................................... 9 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 ............................................... 14 6.5 Test Result ........................................................... 15 7. RADIATED EMISSIONS .............................................. 17 7.1 Block Diagram Of Test Setup ............................................ 17 7.2 Limit ................................................................. 18 7.3 Test procedure ........................................................ 19 7.4 EUT operating Conditions ............................................... 20 7.5 Test Result ........................................................... 21 8. RADIATED BAND EMISSION MEASUREMENT AND RESTRICTED BANDS OF OPERATION .................................................. 25 8.1 Block Diagram Of Test Setup ............................................ 25 8.2 Limit ................................................................. 25 8.3 Test procedure ........................................................ 26 8.4 EUT operating Conditions ............................................... 26 8.5 Test Result ........................................................... 27 9. CONDUCTED EMISSION ............................................. 28 9.1 Block Diagram Of Test Setup ............................................ 28 9.2 Limit ................................................................. 28 9.3 Test procedure ........................................................ 28 9.4 Test Result ........................................................... 29 10. 20 DB BANDWIDTH .................................................. 38 10.1 Block Diagram Of Test Setup .......................................... 38 Report No.: BCTC2012959876E No.：BCTC/RF-EMC-005 Page: 4 of 70 Edition：A.3 10.2 Limit ................................................................ 38 10.3 Test procedure ....................................................... 38 10.4 Test Result .......................................................... 39 11. MAXIMUM PEAK OUTPUT POWER .................................... 44 11.1 Block Diagram Of Test Setup .......................................... 44 11.2 Limit ................................................................ 44 11.3 Test procedure ....................................................... 44 11.4 Test Result .......................................................... 45 12. HOPPING CHANNEL SEPARATION ................................... 50 12.1 Block Diagram Of Test Setup .......................................... 50 12.2 Limit ................................................................ 50 12.3 Test procedure ....................................................... 50 12.4 Test Result .......................................................... 51 13. NUMBER OF HOPPING FREQUENCY .................................. 56 13.1 Block Diagram Of Test Setup .......................................... 56 13.2 Limit ......................…

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Conducted emissions Radiated Measurement Photos