2AWU4-CL-250WHi-Fi Wifi Stereo Audio Amplifier

ShenzhenCloudechoAudioCo.Ltd 1 Hi-FiWifiStereoAudioAmplifier CL-250WInstructionmanual Youarewelcometochooseahigh-fidelityWIFIstereoaudioamplifier!Inordertousethedevice correctly,pleasereadtheinstructionmanualcarefullybeforeuse.Wewillwholeheartedlyprovide youwithbetterproductsandservices. ShenzhenCloudechoAudioCo.Ltd 2 CL-250Wpoweramplifierhas5modes:WiFimode,Bluetoothmode,Vinylmode,Auxinmode, andOpticalfibermode. *FunctionIntroduction ●SupportWiFi2.4G&5G ●SupportBluetooth5.0 ●SupportMicrophone ●SupportVinylMMinput,configureRIAAbalancedamplifiercircuit ●Support24bit/44.1KHz~24bit/192KHz ●SupportDLNA,iHeartRadio,Spotify,TIDAL,Napster,Qobuz,Deezer ●Supportnetworkmulti-room ●Supportopticalfiberinput ●Equippedwithfullfrequencystereooutput *Maintechnicalparameters NameTechnicalParameter ProductNameHi-FiWIFIStereoAudioAmplifier ProductModelCL-250W AudioInputWIFI/Bluetooth/OPTICAL/AUX/VinylMM AudioOutputSPEAKERR+L/RCA WorkVoltageDC32V-5A OutputPower2X100W(4Ω) FrequencyResponse20Hz-20kHz HarmonicDistortion0.05% Impedance 2kOhm SNR95db AUXinputsensitivity1V VinylinputsensitivityMMphono-5MV RCAoutputratedlevel1V Netweight1.3kg Dimension22.5cm*20.2cm*4.5cm ShenzhenCloudechoAudioCo.Ltd 3 *Structurediagramanddescription (Frontpanel) 1.Powerswitch 2.ModeControl/VolumeTrebleBassControl 3.WIFImodeindicator 4.Bluetoothmodeindicator 5.Phono/AUXmodeindicator 6.Opticalfibermodeindicator 7.Bassadjustmentindicator 8.Trebleadjustmentindicator 9.Infraredremotecontrolreceiverport ShenzhenCloudechoAudioCo.Ltd 4 (Rearpanel) 10.Externalgroundwire 11.Pairing/Resetbutton 12.Opticalfiberinputinterface 13.3.5Analoginputinterface 14.PhonoMMinputinterface 15.Subwooferoutputinterface 16.Updateinterface 17.DCpowerinterface 18.Rightchannelpoweroutput 19.Leftchannelpoweroutput 20.MICreceivingantenna 21.Bluetooth&WiFIantenna ShenzhenCloudechoAudioCo.Ltd 5 (Remotecontrol) *Instruction 1.Poweronandreset (1)Whenpowerison,thesystemhasaninitializationprocess.Duringtheinitializationprocess,the indicatorlightisinarunningstate.Aftertheinitializationiscompleted,thefirstmodeenteredby thedeviceisthemodememorizedbeforethelastpower-off,andthevolume,highandlowbass willalsobesettothesizebeforethelastpower-off; (2)Ifyouwanttoresetthevolume,highandlowsounds,youcanpressandholdtheRESET/WPS buttononthebackofthedevicefor3seconds,andyoucanletgowhenyouseeallthelightsflash quickly(200msonand200msoff). 2.Modesandswitching ShenzhenCloudechoAudioCo.Ltd 6 CL-250Wdevicehas5modes:WiFimode,Bluetoothmode,Vinylmode,Auxinmode,andOptical fibermode.Clickthebuttononthefrontpaneltoswitchmodes. 2.1WiFimode TheWiFiindicatorisflashingfast(100msonand100msoff)whenthepowerisjustturnedon,and theWiFilightflashesslowly(500msonand500msoff)whenthestartupiscompletedandnot connected,andisonwhenconnected.Seethetablebelowfordetails: WiFiindicatorstatusCorrespondingWiFiworkingstatus Fastflashing(100mson,100msoff) WiFiisstarting WiFifactoryreset WiFiisupgrading Slowflashing(500mson,500msoff)WiFiisnotconnected Lightlongon WiFiisconnected(anyconnectionofrouter, AP,Ethernet,ornetworkisalwayson) Superslowflashing(1son,1soff)Mute Table1WiFiindicatoranditscorrespondingworkingstatus (1)Releasehotspot:WiFidistributionnetworkneedstobeusedwithMUZOPodAppplayer.After distributionnetwork,WiFihotspotwillbehidden.IfyouneedtoreleasethehiddenWiFihotspot, youcanshortlypresstheResetbuttononthebackofthedevice; (2)Restorefactorysettings:LongpresstheResetbuttonformorethan5seconds,theWiFi indicatororResetindicatorflashesquickly,thenyoucanletgo; (3)MoresettingsneedtobeusedwithMUZOplayer,pleasechecktheinstructionsoftheAPP. iosversion：Pleasegodirectlytothemobileapplicationmarkettodownloadthe MuzoPodAPP. Androidversion：Pleasegodirectlytothemobileapplicationmarkettodownload theMuzoPodAPP. 2.1.1MuzoAPPapplication Firsttimeconnection:BeforeusingthisAPPforthefirsttime,makesurethattheaudioamplifier andspeakerareproperlyconnectedandworking. ShenzhenCloudechoAudioCo.Ltd 7 OpenMUZOPodApp,accordingtotheAPPprompt,aftersearchingforthenameoftheaudio amplifierthatneedstobenetworked,selectWiFiinthesameLANasthemobiledevice,andenter theWiFipasswordtoconfiguretheamplifier.(SeeFigure1,Figure2) Ifyouwanttoaddotherhomewirelessnetworkdevicesthatarenotconnected,click"+"inthe devicelisttoaddthedevice.(SeeFigure3) Afteraddingthedevice,youcannamethedeviceaccordingtoyourneeds.Forexample,ifyour speakersareplacedinthebedroom,youcanchoosetonameitasthebedroom.(SeeFigure4) Synchronousplaybackandseparateplaybackfunction,thisAPPcanprovidepowerfulsynchronous playbackfunction.Inthedevicelistinterface,youcanseetheusagestatusofallyourdevices,play songs,soundvolume,andchannelselectionataglance.(Figure5) Switchtosynchronousplaybackmode:longpressthedeviceanddragtothedevicetobe synchronized;switchtoseparateplaybackmode:longpressthedeviceanddragdown(SeeFigure 6) （Figure1）（Figure2）（Figure3） ShenzhenCloudechoAudioCo.Ltd 8 （Figure4）（Figure5）（Figure6） 2.2Bluetoothmode BluetoothandWiFibelongtothesamemodule,andBluetoothwillalsohaveastartupprocess whenitispoweredon.Duringthisprocess,theBluetoothindicatorflashesquickly(100msonand 100msoff).Seethetablebelowfordetails: BTindicatorstatusCorrespondingBluetoothworkingstatus Fastflashing(100mson,100msoff)Bluetoothisstarting Slowblinking1(200msonand800msoff)BluetoothisreconnectingorBluetoothishidden Slowflashing2(400mson,400msoff)Bluetoothispaired LightlongonBluetoothconnected ShenzhenCloudechoAudioCo.Ltd 9 Superslowflashing(1son,1soff)Mute Table2Bluetoothindicatoranditscorrespondingworkingstatus IfyouwanttodisconnectBluetooth,hideBluetoothorreleaseBluetooth,youcanpressthe RESET/WPSbuttonbriefly. 2.3Vinylmode ClicktheModebutton,theLPindicatorlightsupandentersthevinylmode.TheRCAconnectorof thedeviceandthevinylrecordplayerislocatedonthebackofthedevicelabeled"PHONO".The LPindicatorflashesslowlywhenmuted(1sonand1soff). 2.4Auxinmode ClicktheModebutton,theLPindicatorflashesslowly(500msoffand500mson)toenterAuxin mode.TheAuxinconnectorofthedeviceandtheaudiosourceislocatedonthebackofthe devicelabeled"AUX".TheLPindicatorfla…

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Shenzhen Cloudecho Audio Co.,Ltd Rm707, Biwan Building, Biwan Road, Baoan District, Shenzhen, P.R.China Agent Authorization Date: Jul 27, 2020 Company: Shenzhen Cloudecho Audio Co.,Ltd Address: Rm707, Biwan Building, Biwan Road, Baoan District, Shenzhen, P.R.China Product Description: Hi-Fi Wifi Stereo Audio Amplifier FCC ID Number: 2AWU4-CL-250W Tested Model Number: CL-250W We authorize Eurofins Product Service GmbH, Storkower Strasse 38c, D-15526 Reichenwalde, Germany, to act on our behalf on all matters concerning the certification of above mentioned equipment. We declare that Eurofins Product Service GmbH is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by Eurofins Product Service GmbH on our behalf shall have the same effect as acts of our own. We, Shenzhen Cloudecho Audio Co.,Ltd, the undersigned, hereby authorize Shenzhen Toby Technology Co., Ltd. (Ivan Su, Supervisor of EMC Dep.), Shenzhen Microwave Certification Services Co., Ltd. (Gilbert Lui, Marketing Manager) and Ka.Ma.S UG (Karin Schmidt, CEO) on our behalf, to apply to the Federal Communications Commission on our equipment. We, the undersigned, hereby authorize Shenzhen Toby Technology Co., Ltd. (Ivan Su, Supervisor of EMC Dep.) to act on our behalf in matters relating to the application for a FCC equipment authorization for mentioned FCC ID Number including the signing of Form 731, necessary forms and documents in connection with this application. Any and all acts carried out by Shenzhen Toby Technology Co., Ltd. (Ivan Su, Supervisor of EMC Dep.) on our behalf shall have the same effect as acts of our own. This authorization expires on 31th December, 2020. Yours Sincerely, <Signature of Camille Lee > Name: Camille Lee Company: Shenzhen Cloudecho Audio Co.,Ltd Address: Rm707, Biwan Building, Biwan Road, Baoan District, Shenzhen, P.R.China Phone: 0755-8524547 Fax: 0755-85245473 E-Mail: [email protected]

Shenzhen Cloudecho Audio Co.,Ltd Rm707, Biwan Building, Biwan Road, Baoan District, Shenzhen, P.R.China Date: Jul 27, 2020 UNII Device Declaration Letter To whom it may concern: We have declared below featured for FCC equipment authorization, Device FCC ID: 2AWU4-CL-250W (1) DFS Device: Master Client with Radar detection capability N/A Client without radar detection capability, (2) Active / Passive Scanning , adhoc mode access point capability Frequency Band (MHz) Active Scanning (the device can transmit a probe (beacon)) passive scanning (where the device is can listen only with no probes) Ad Hoc Mode capability Access point capability 5180-5240 Yes No Yes No Yes No Yes No 5190-5230 Yes No Yes No Yes No Yes No 5210-5210 Yes No Yes No Yes No Yes No 5745-5825 Yes No Yes No Yes No Yes No 5755-5795 Yes No Yes No Yes No Yes No 5775-5775 Yes No Yes No Yes No Yes No (3) Country code selection ability Yes No If yes, pls explain how it was implemented: (4) Meet 15.202 requirement Yes No pls check below : A master device is defined as a device operating in a mode in which it has the capability to transmit without receiving an enabling signal. In this mode it is able to select a channel and initiate a network by sending enabling signals to other devices A client device is defined as a device operating in a mode in which the transmissions of the device are under control of the master. A device in client mode is not able to initiate a network. (5) For client devices that have software configuration control to operate in different modes (active scanning in some and passive scanning in others) in different bands (devices with multiple equipment classes or those that operate on non-DFS frequencies) or modular devices which configure the modes of operations through software, the application must provide software and operations description on how the software and / or hardware is implemented to ensure that proper operations modes cannot be modified by end user or an installer. Apply Does not apply (If apply, pls help to provide explanation on it was implement, and how software was controlled) Should you have any questions or comments regarding this matter, please have my best attention. Sincerely, Name: Camille Lee Company: Shenzhen Cloudecho Audio Co.,Ltd Address: Rm707, Biwan Building, Biwan Road, Baoan District, Shenzhen, P.R.China Phone: 0755-8524547 Fax: 0755-85245473 E-Mail: [email protected]

version: 2.0 02_Form731 [Equipment Class] page 1 / 3 TCB APPLICATION FORM 731 Rev3.0 2013-12-04 DE To be completed by Eurofins Product Service GmbH Project Number: K7M22008-0019 Item 1. Applicant's complete, legal business name: Shenzhen Cloudecho Audio Co.,Ltd Applicant’s FCC Registration Number (FRN): 0029748399 Item 2. Address Line 1 Rm707, Biwan Building, Biwan Road, Baoan District Address Line 2: P.O. Box City: Shenzhen State Zip/Postal Code: Country: China Item 3. FCC ID Grantee Code: 2AWU4 EPC (Equipment Product Code, max. 14 characters): -CL-250W Item 5. Person at the applicant's address to receive grant or for contact: First Name: Camille Middle Initials: Last Name: Lee Title: Sales manager Mail Stop: Phone: 0755-8524547 Fax: 0755-85245473 E-mail: [email protected] Item 6. Technical Contact: Company Name: Shenzhen Toby Technology Co., Ltd. First Name: Ivan Middle Initials: Last Name: Su Address Line 1 1A/F., Bldg.6, Yusheng Industrial Zone, Address Line 2: The National Road No.107, Xixiang Section 467, P.O. Box City: Shenzhen, State: Guangdong, Zip/Postal Code: 518126 Country: China Phone: (86) 755-26509301/2-8058 Fax: (86) 755-26509195 E-mail: [email protected] Item 7. Non-Technical Contact: Company Name: Shenzhen Toby Technology Co., Ltd. First Name: Ivan Middle Initials: Last Name: Su Address Line 1 1A/F., Bldg.6, Yusheng Industrial Zone, Address Line 2: The National Road No.107, Xixiang Section 467, P.O. Box City: Shenzhen, State: Guangdong, Zip/Postal Code: 518126 Country: China Phone: (86) 755-26509301/2-8058 Fax: (86) 755-26509195 E-mail: [email protected] Item 4. TCB Contact Information: All questions regarding the application will be directed to this contact. The original grant and invoice will be sent to this contact. TCB Login: DE0005 0008466054 Eurofins Product Service GmbH, Storkower Str. 38c, 15526 Reichenwalde, Germany Authorized person filing: Jörg Kusig Item 5. TCB Scope: A1: Unlicensed Radio Frequency Devices - Low power transmitters operating on frequencies below 1 GHz A2: Unlicensed Radio Frequency Devices - Low power transmitters operating on frequencies above 1 GHz, with the exception of spread spectrum devices. A3: Unlicensed Radio Frequency Devices - Unlicensed Personal Communication System (PCS) devices A4: Unlicensed National Information Infrastructure (UNII) devices and low power transmitters using spread spectrum techniques B1: Licensed Radio Service Equipment - Personal Mobile Radio Services in 47 CFR Parts 22 (cellular), 24, 25, 26, and 27 B2: Licensed Radio Service Equipment -General Mobile Radio Services in the following 47 CFR Parts 22 (non-cellular), 74, 90, 95 and 97 B3: Licensed Radio Service Equipment -Maritime and Aviation Radio Services in 47 CFR Parts 80 and 87 B4: Licensed Radio Service Equipment -Microwave Radio Services in 47 CFR Parts 21, 74 and 101 C1: Telephone Terminal Equipment (47 CFR Part 68) version: 2.0 02_Form731 [Equipment Class] page 2 / 3 Item 8. Confidentiality Request: (a) Does this application include a request for confidentiality for any portion(s) of the data contained in this application pursuant to 47 CFR § 0.459 of the Commission Rules? Yes No (b) Does short-term confidentiality apply to this application? Yes No If yes, specify the short-term confidentiality release date: MM/DD/YYYY Item 9. Related OET KnowledgeDataBase (KDB) Inquiry: Is there a KDB inquiry associated with this application? Yes No If so, enter the inquiry tracking number: Item 10. Modular Approval: Is this application for modular approval? If “Yes”, please submit a cover letter addressing the modular approval requirements of DA 00-1407. Yes No Modular Type: Please chose: Item 11. Software Defined Radio Authorization: Is this application for software defined radio authorization? Yes No Item 12. Equipment Class: NII Description of product as it is marketed: (Note: This text will appear below the equipment class on the grant): Hi-Fi Wifi Stereo Audio Amplifier Item 13. Application Purpose: Original equipment Change in identification of presently authorized equipment: Original FCC ID: Grant date (MM/DD/YYY): Class II permissive change or modification of presently authorized equipment Item 14. Composite / Related Equipment: Is the equipment in this application: (a) a composite device subject to an additional equipment authorization? Yes No (b) part of a system that operates with, or is marketed with, another device that requires an equipment authorization? Yes No If either of the above questions is answered “Yes”, please complete section 13(c). (c) The related application: FCC ID(s): has been granted under the FCC ID(s) listed to the right is in the process of being filed under the FCC ID(s) listed to the right 2AWU4-CL-250W is pending with the FCC under the FCC ID(s) listed to the right has a mix of pending and granted statuses under the FCC ID8s) to the right: Item 15. Test Firm Information: Name of test firm and contact person on file with the FCC, if different from applicant or contact person: Company Name: Shenzhen Toby Technology Co., Ltd. Contact Name: Ivan Su (Supervisor of EMC Dep.) Address: 1A/F., Bldg.6, Yusheng Industrial Zone, The National Road No.107, City: Xixiang Section 467, Shenzhen, State: Guangdong, Zip Code: 518126 Country: China Phone: (86) 755- 26509301/2-8058 Fax: (86) 755-26509195 E-Mail: [email protected] FCC Registered Test Site Number (required for part 15 and 18 applications): 854351 Item 16. Grant Comments: Note: Text will appear at the bottom of the Grant of Equipment Authorization. Output power listed is average conducted. This device supports 802.11a, 802.11n and 802.11ac with a 20 MHz, 40 MHz and 80 MHz bandwidth mode. RF exposure compliance is addressed for 1.1310 and 2.1091 MPE limits. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons. End Users must be provided with transmitter operation conditions for satisfying RF exposure com…

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Page: 3 of 16 FCC ID: 2AWU4-CL-250W TB-RF-074-1.0 Appendix III EUT External Photographs Photo 1 Appearance of EUT Photo 2 Appearance of EUT Page: 4 of 16 FCC ID: 2AWU4-CL-250W TB-RF-074-1.0 Photo 3 Appearance of EUT Photo 4 Appearance of EUT 2.4G/5G WIFI/BT ANT. MIC RX ANT. Page: 5 of 16 FCC ID: 2AWU4-CL-250W TB-RF-074-1.0 Photo 5 Appearance of EUT Photo 6 Appearance of EUT Page: 6 of 16 FCC ID: 2AWU4-CL-250W TB-RF-074-1.0 Photo 7 Appearance of EUT Photo 8 Appearance of EUT

Page: 1 of 16 FCC ID: 2AWU4-CL-250W TB-RF-074-1.0 Appendix IFCC ID Label Size for the label: 30mm X 30mm FCCID : 2AWU4-CL-250W Model: CL-250W 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. 2. This device must accept any interference received, including interference that may cause undesired operation. Page: 2 of 16 FCC ID: 2AWU4-CL-250W TB-RF-074-1.0 Appendix II ID Label Location ID LOCATION

Page: 7 of 16 FCC ID: 2AWU4-CL-250W TB-RF-074-1.0 Appendix IV EUT Internal Photographs Photo 9 Internal of EUT Photo 10 Internal of PCB Page: 8 of 16 FCC ID: 2AWU4-CL-250W TB-RF-074-1.0 Photo 11 Internal of PCB Photo 12 Internal of PCB Page: 9 of 16 FCC ID: 2AWU4-CL-250W TB-RF-074-1.0 Photo 13 Appearance of antenna Photo 14 Internal of PCB Page: 10 of 16 FCC ID: 2AWU4-CL-250W TB-RF-074-1.0 Photo 15 Internal of PCB Photo 16 Internal of PCB Page: 11 of 16 FCC ID: 2AWU4-CL-250W TB-RF-074-1.0 Photo 17 Internal of PCB Photo 18 Internal of PCB Page: 12 of 16 FCC ID: 2AWU4-CL-250W TB-RF-074-1.0 Photo 19 Internal of PCB Photo 20 Appearance of Adapter Page: 13 of 16 FCC ID: 2AWU4-CL-250W TB-RF-074-1.0 Photo 21 Internal of PCB Photo 22 Internal of PCB Page: 14 of 16 FCC ID: 2AWU4-CL-250W TB-RF-074-1.0 Photo 23 Internal of PCB

Shenzhen Toby Technology Co., Ltd. Report No.: TB-MPE174056 Page: 1 of 5 TB-RF-074-1.0 1A/F., Bldg.6, Yusheng Industrial Zone, The National Road No.107 Xixiang Section 467, Xixiang, Bao’an, Shenzhen, China Tel: +86 75526509301 Fax: +86 75526509195 RF Exposure Evaluation FCC ID: 2AWU4-CL-250W 1. Client Information Applicant : Shenzhen Cloudecho Audio Co.,Ltd Address : Rm707, Biwan Building, Biwan Road, Baoan District, Shenzhen, P.R.China Manufacturer : Shenzhen Cloudecho Audio Co.,Ltd Address : Rm707, Biwan Building, Biwan Road, Baoan District, Shenzhen, P.R.China 2. General Description of EUT EUT Name : Hi-Fi Wifi Stereo Audio Amplifier Models No. : CL-250W Model Difference : N/A Product Description : Operation Frequency: 2.4G: 802.11b/g/n(HT20): 2412MHz~2462MHz Bluetooth 5.0: 2402MHz~2480MHz 5G: U-NII-1: 5180MHz~5240MHz Modulation Type: 802.11b: DSSS(CCK, DQPSK, DBPSK) 802.11g/n: OFDM(BPSK,QPSK,16QAM, 64QAM) 802.11a: OFDM (QPSK, BPSK, 16QAM) 802.11ac: OFDM (QPSK, BPSK, 16QAM, 64QAM, 256QAM) BLE: GFSK Power Supply : Adapter(3205000) Input: AC 100~240V, 50/60Hz 2.2A MAX Output: DC 32V, 5A. Software Version : V38 Hardware Version : V1.0 Connecting I/O Port(S) : Please refer to the User's Manual Remark : The adapter and antenna gain provided by the applicant, the verified for the RF conduction test provided by TOBY test lab.the MPE report used the EUT( TBBJ-20200629-12-2# ). Note: More test information about the EUT please refer the RF Test Report. Report No.: TB-MPE174056 Page: 2 of 5 TB-RF-074-1.0 SAR Test Exclusion Calculations 1. FCC: According to KDB 447498 D01 Mobile and Portable Devices RF Exposure Procedures and Equipment Authorization Policies v06. (1) Clause 4.3: General SAR test reduction and exclusion guidance Sub clause 4.31: Standalone SAR test exclusion considerations 1) The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6GHz at test separation distance≤5 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation, mm)]*[√f (GHz) ] ≤3.0 for 1-g SAR [(max. power of channel, including tune-up tolerance, mW)/(min. test separation, mm)]*[√f (GHz) ] ≤7.5.0 for 10-g SAR Report No.: TB-MPE174056 Page: 3 of 5 TB-RF-074-1.0 2. Test Result 2.4GHz WLAN Mode Freq. (MHz) Conducted Power(max) (dBm) [P] ANT Gain (dBi) [G] Distance (cm) [R] Power Density (mW/ cm2) [S] Power Density Limit (mW/ cm2) Result 802.11b 2412 15.54 2 20 0.01129 1.000 PASS 2437 15.55 2 20 0.01132 2462 15.22 2 20 0.01049 802.11g 2412 14.35 2 20 0.00859 2437 14.99 2 20 0.00995 2462 14.80 2 20 0.00952 802.11n (HT20) 2412 13.13 2 20 0.00648 2437 13.78 2 20 0.00753 2462 13.00 2 20 0.00629 2.4GHz Bluetooth MODE f (GHz) Conducted Power(max) (dBm) [P] ANT Gain (dBi) [G] Distance (cm) [R] Power Density (mW/ cm 2 ) [S] Power Density Limit (mW/ cm 2 ) Result BLE 2.402 -3.146 2 20 0.00015 1 PASS 2.442 -2.726 2 20 0.00017 2.480 -2.806 2 20 0.00017 2.4GHz Bluetooth MODE f (GHz) Minimum Separation Distance (mm) ANT Gain (dBi) [G] Distance (cm) [R] Power Density (mW/ cm 2 ) [S] Power Density Limit (mW/ cm 2 ) Result GFSK 2.402 2.576 2 20 0.00057 1 PASS 2.441 2.958 2 20 0.00062 2.480 3.000 2 20 0.00063 π /4-DQPSK 2.402 1.883 2 20 0.00049 2.441 2.410 2 20 0.00055 2.480 2.425 2 20 0.00055 8-DPSK 2.402 2.094 2 20 0.00051 2.441 2.525 2 20 0.00056 2.480 2.501 2 20 0.00056 Report No.: TB-MPE174056 Page: 4 of 5 TB-RF-074-1.0 5GHz WLAN MODE f (GHz) Conducted Power(max) (dBm) [P] ANT Gain(d Bi) Distance (cm) [R] Power Density (mW/ cm 2 ) [S] Power Density Limit (mW/ cm 2 Result 802.11a 5.180 12.28 2 20 0.00533 1.0 Pass 5.200 12.15 2 20 0.00517 5.240 12.41 2 20 0.00549 802.11n (HT20) 5.180 12.15 2 20 0.00517 5.200 12.84 2 20 0.00606 5.240 12.36 2 20 0.00543 802.11ac (VHT20) 5.180 12.19 2 20 0.00522 5.200 12.18 2 20 0.00521 5.240 12.73 2 20 0.00591 802.11n (HT40) 5.190 11.52 2 20 0.00563 5.230 11.86 2 20 0.00484 802.11ac (VHT40) 5.190 11.67 2 20 0.00463 5.230 11.94 2 20 0.00493 802.11ac (VHT80) 5.210 11.61 2 20 0.00457 Report No.: TB-MPE174056 Page: 5 of 5 TB-RF-074-1.0 3. Conclusion: The measurement results comply with the FCC Limit per 47 CFR 2.1091 for the uncontrolled RF Exposure of mobile device. Limits for General Population/ Uncontrolled Exposure Frequency Range (MHz) Power density (mW/ cm 2 ) 300-1,500 F/1500 1,500-100,000 1.0 Maximum MPE ratio 2.4GWLAN Limit Results 0.01132 1.0 PASS For 802.11b/g/n:2412~2462 MHz For BLE: 2402MHz~2480MHz For U-NII-1: 5180MHz~5240MHz MPE limit S: 1mW/ cm 2 The MPE is calculated as 0.01132mW / cm 2 < limit 1mW / cm 2 . So, the device compliance the RF Exposure requirement. The EUT will only be used with a separation of 20cm or greater between the antenna and nearby persons and can therefore be considered a mobile transmitter per 47 CFR2.1091 (b). The RF Exposure Information page from the manual is included here for reference. Note For a more detailed features description, please refer to the RF Test Report. -----END OF REPORT-----

S henzhen Toby Technology Co., Ltd. Report No.: TB-FCC174065 Page: 1 of 113 TB-RF-074-1.0 1A /F., Bldg.6, Yusheng Industrial Zone, The National Road No.107 Xixiang Section 467, Xixiang, Bao’an, Shenzhen, China Tel: +86 75526509301 Fax: +86 75526509195 FCC Radio Test Report FCC ID: 2A WU4-CL-250W Original Grant Report No. : T B-FCC174065 Applicant : Shenzhen Cloudecho Audio Co.,Ltd Equipment Under Test (EUT) EUT Name : Hi-Fi Wifi Stereo Audio Amplifier Model No. : CL-250W Series Model No. N/A Brand Name : Cloud yx Sample ID : T BBJ-20200629-12-1#& TBBJ-20200629-12-2# Receipt Date : 202 0-07-07 Test Date : 2020-07-08 to 2020-08-10 Issue Date : 2020-08-11 Standards : FCC Part 15, Subpart E 15.407 Test Method : ANSI C63.10: 2013 Conclusions : PASS In t he configuration tested, the EUT complied with the standards specified above, The EUT technically complies with the FCC and IC requirements Test/Witness Engineer : Jack Deng Test/Witness Engineer : Ivan Su Approved& Authorized : Ray Lai This report details the results of the testing carried out on one sample. The results contained in this test report do not relate to other samples of the same product. The manufacturer should ensure that all products in series production are in conformity with the product sample detailed in the report. Report No.: TB-FCC174065 Page: 2 of 113 TB-RF-074-1.0 Contents CONTENTS ............................................................................................................................................. 2 1. GENERAL INFORMATION ABOUT EUT.............................................................................. 5 1. 1 Client Information ................................................................................................................. 5 1.2 General Description of EUT (Equipment Under Test) ................................................... 5 1.3 Block Diagram Showing the Configuration of System Tested ...................................... 6 1.4 Description of Support Units .............................................................................................. 6 1. 5 Description of Test Mode .................................................................................................... 7 1. 6 Description of Test Software Setting ................................................................................ 9 1.7 Measurement Uncertainty ................................................................................................ 10 1.8 Test Facility ......................................................................................................................... 10 2. TEST SUMMARY ..................................................................................................................... 11 3. TEST SOFTWARE ................................................................................................................... 11 4. TES T EQUIPMENT .................................................................................................................. 13 5. CONDU CTED EMISSION TEST ........................................................................................... 14 5. 1 Test Standard and Limit .................................................................................................... 14 5. 2 Test Setup ........................................................................................................................... 14 5. 3 Test Procedure ................................................................................................................... 15 5.4 Deviation From Test Standard ......................................................................................... 15 5.5 EUT Operating Mode ........................................................................................................ 15 5. 6 Test Data ............................................................................................................................. 15 6. RADIATED EMISSION TEST ................................................................................................ 16 6.1 Test Standard and Limit .................................................................................................... 16 6. 2 Test Setup ........................................................................................................................... 17 6.3 Test Procedure ................................................................................................................... 18 6. 4 Deviation From Test Standard ......................................................................................... 19 6.5 EUT Operating Condition ................................................................................................. 19 6.6 Test Data ............................................................................................................................. 19 7. BAND EDGE EMISSIONS ..................................................................................................... 20 7.1 Test Standard and Limit .................................................................................................... 20 7.2 Test Setup ........................................................................................................................... 20 7.3 Test Procedure ................................................................................................................... 21 7. 4 Deviation From Test Standard ......................................................................................... 21 7.5 EUT Operating Condition ................................................................................................. 21 7.6 Test Data ............................................................................................................................. 21 8. BANDWIDTH TEST ................................................................................................................. 22 8…

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Page: 15 of 16 FCC ID: 2AWU4-CL-250W TB-RF-074-1.0 Appendix V EUT Test Photographs 15C Test Setup Photo of Setup for Radiated Emission (Above 1 GHz) Photo of Setup for Radiated Emission (Below 1 GHz) Page: 16 of 16 FCC ID: 2AWU4-CL-250W TB-RF-074-1.0 Photo of Setup for Conducted Emission -----END OF REPORT-----