2BB2E-A01Bluetooth Speakers

ShenzhenshiRUICHUTechnologyCo.,Ltd Theinformationprovidedin thisletteris basedon thereferencedrulepartsof Title47 of theCFRas wellas KDB986446D01. Anexpirationdateforthisletterdoesnotexist.In casetheU.S.agentchanges,thegranteeis obligatedto notifytheFCCwithin30 daysvia thegrantingTCB. FederalCommunicationsCommission Authorizationand EvaluationDivision EquipmentAuthorizationBranch 7435 OaklandMills Road Columbia,MD 21046 7/11/23 U.S. AgentDesignation ShenzhenshiRUICHUTechnologyCo.,Ltdacknowledgestheir consentfor the followingcontact locatedin the UnitedStatesto act as their agentfor serviceof processfor the equipmentfor which authorizationis sought(FCC ID: 2BB2E-A01): Nameand companyof U.S. agent:Tim Payne,FCC US Agent,LLC PhysicalU.S. addressof agent:3722 IllinoisAvenue,Saint Charles,IL, 60174,USA FRN of U.S. agent:0033402884 Email addressof U.S. agent:[email protected] FCC US Agent,LLCacknowledgestheir obligationto acceptserviceof processon behalfof ShenzhenshiRUICHUTechnologyCo.,Ltd. ShenzhenshiRUICHUTechnologyCo.,Ltdwith theFRN 0033994153acceptsits obligationto maintainan agent for serviceof processin the UnitedStatesfor no less than one year after either the granteehas permanentlyterminatedall marketingand importationof the applicableequipmentwithin the U.S., or the conclusionof any Commission-relatedadministrativeor judicialproceedinginvolving the equipment,whicheveris later. By signingthis form, we confirmthe aboveand that we are awareof the applicationrequirements listed under § 2.911(d)(7) Sincerely, Signature XU YUN CEO ShenzhenshiRUICHUTechnologyCo.,Ltd Signature Tim Payne Manager FCC US Agent,LLC 48_[model] US_Agent_2.911(d)(7)-U, V04

FCC ID: 2BB2E-A01 Page 1 of 4 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. External Photos Photo 1 Photo 2 FCC ID: 2BB2E-A01 Page 2 of 4 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. Photo 3 Photo 4 FCC ID: 2BB2E-A01 Page 3 of 4 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. Photo 5 Photo 6 FCC ID: 2BB2E-A01 Page 4 of 4 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. Photo 7 Photo 8 ------End------

Label FCC ID: 2BB2E-A01

FCC ID: 2BB2E-A01 Page 1 of 3 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. Internal Photos Photo 1 Photo 2 FCC ID: 2BB2E-A01 Page 2 of 3 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. Photo 3 Photo 4 FCC ID: 2BB2E-A01 Page 3 of 3 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. Photo 5 Photo 6 ------End------ Antenna1

RF Exposure evaluation FCC ID: 2BB2E-A01 Exposure category: General population/uncontrolled environment EUT Type: Production Unit Device Type: Mobile Device 1. Reference According to §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 §1.1310 and §2.1091 RF exposure is calculated. KDB447498 D01: Mobile and Portable Devices RF Exposure Procedures and Equipment Authorization Policies 2. Limit Limits for Maximum Permissible Exposure (MPE)/Controlled Exposure Frequency Range(MHz) Electric Field Strength(V/m) Magnetic Field Strength(A/m) Power Density (mW/cm²) Averaging Time (minute) Limits for Occupational/Controlled Exposure 0.3 – 3.0 3.0 – 30 30 – 300 300 – 1500 1500 – 100,000 614 1842/f 61.4 / / 1.63 4.89/f 0.163 / / (100) * (900/f 2 )* 1.0 f/300 5 6 6 6 6 6 Limits for Maximum Permissible Exposure (MPE)/Uncontrolled Exposure Frequency Range(MHz) Electric Field Strength(V/m) Magnetic Field Strength(A/m) Power Density (mW/cm²) Averaging Time (minute) Limits for Occupational/Controlled Exposure 0.3 – 3.0 3.0 – 30 30 – 300 300 – 1500 1500 – 100,000 614 824/f 27.5 / / 1.63 2.19/f 0.073 / / (100) * (180/f 2 )* 0.2 f/1500 1.0 30 30 30 30 30 F=frequency in MHz *=Plane-wave equivalent power density 3. MPE Calculation Method Predication of MPE limit at a given distance Equation from page 18 of OET Bulletin 65, Edition 97-01 S=PG/4πR² Where: S=power density P=power input to antenna G=power gain of the antenna in the direction of interest relative to an isotropic radiator R=distance to the center of radiation of the antenna 4. Antenna Information Only use antennas certificated as follows provided by manufacturer; Antenna No. Model No. of antenna: Type of antenna: Gain of the antenna (Max.) Frequency range: BT / PCB ANT -0.58dBi for 2400-2500MHz 5. Manufacturing Tolerance BT(Conducted) Frequency (MHz) GFSK 2402 2441 2480 Target (dBm) 3.0 3.0 3.0 Tolerance ± (dB) 1.0 1.0 1.0 Frequency (MHz) π/4DQPSK 2402 2441 2480 Target (dBm) 4.0 4.0 4.0 Tolerance ± (dB) 1.0 1.0 1.0 Frequency (MHz) GFSK(BLE 1M) 2402 2441 2480 Target (dBm) 3.0 3.0 3.0 Tolerance ± (dB) 1.0 1.0 1.0 Frequency (MHz) GFSK(BLE 2M) 2402 2441 2480 Target (dBm) 3.0 3.0 3.0 Tolerance ± (dB) 1.0 1.0 1.0 6. Standalone MPE Result As declared by the Applicant, the EUT is a wireless device used in a fix application, at least 20 cm from any body part of the user or nearby persons; from the maximum EUT RF output power, the minimum separation distance, r =20cm, as well as the gain of the used antenna is 2.54dBi, the RF power density can be obtained. Modulation Type Output power Antenna Gain (dBi) Antenna Gain (linear) MPE (mW/cm 2 ) MPE Limits (mW/cm 2 ) dBm mW BT 5 3.162 -0.58 0.87 0.000550 1.0000 Remark: 1. Output power (Peak) including turn-up tolerance; 2. MPE evaluate distance is 20cm from user manual provide by manufacturer. 7. Conclusion The measurement results comply with the FCC Limit per 47 CFR 2.1091 for the uncontrolled RF Exposure of mobile device. ----------------THE END OF REPORT---------------

Page 1 of 38 Report No.: AIT23070701FW1 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. TEST REPORT Client Information: Applicant: Shenzhenshi RUICHU Technology Co.,Ltd Applicant add.: Room 1102, Haicheng Business Building, Dalang Street, Longhua District, Shenzhen, Guangdong 518000 China Manufacturer: Shenzhenshi RUICHU Technology Co.,Ltd Manufacturer add.: Room 1102, Haicheng Business Building, Dalang Street, Longhua District, Shenzhen, Guangdong 518000 China Product Information: Product Name: Bluetooth Speakers Model No.: A01, A02, A03, A04, A05, A06, A07, A08, A09, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, B01, B02, B03, B04, B05, B06, B07, B08, B09, B10, B11, B12, B13, B14, B15, B16, B17, B18, B19, B20, C01, C02, C03, C04, C05, C06, C07, C08, C09, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20 Brand Name: N/A FCC ID: 2BB2E-A01 Applicable standards: FCC CFR Title 47 Part 15 Subpart C Section 15.247 Prepared By: Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang,Dongguan, Guangdong, China Tel.: +86-769-8202 0499 Fax.: +86-769-8202 0495 Date of Receipt: July 07, 2023 Date of Test: July 07, 2023~July 10, 2023 Date of Issue: July 11, 2023 Test Result: Pass This device described above has been tested by Dongguan Yaxu (AiT) Technology Limited and the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. Note: This report shall not be reproduced except in full, without the written approval of Dongguan Yaxu (AiT) Technology Limited, this document may be altered or revised by Dongguan Yaxu (AiT) Technology Limited, personal only, and shall be noted in the revision of the document. This test report must not be used by the client to claim product endorsement. Reviewed by: Approved by: Simba Huang Seal.chen Page 2 of 38 Report No.: AIT23070701FW1 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. 1 Contents Page COVER PAGE 1 CONTENTS .................................................................................................................................................................... 2 2 TEST SUMMARY .......................................................................................................................................................... 4 2.1 Statement of the Measurement Uncertainty ............................................................................... 4 2.2 Measurement Uncertainty ........................................................................................................... 4 3 TEST FACILITY ............................................................................................................................................................. 5 3.1 Deviation from standard .............................................................................................................. 5 3.2 Abnormalities from standard conditions ...................................................................................... 5 3.3 Test Location ............................................................................................................................... 5 4 GENERAL INFORMATION ......................................................................................................................................... 6 4.1 Test frequencies .......................................................................................................................... 7 4.2 EUT Peripheral List ..................................................................................................................... 8 4.3 Test Peripheral List ...................................................................................................................... 8 4.4 TEST METHODOLOGY .............................................................................................................. 9 4.5 Description of Test Modes ......................................................................................................... 10 5 EQUIPMENT USED DURING TEST ........................................................................................................................ 11 6 TEST RESULTS AND MEASUREMENT DATA .................................................................................................... 12 6.1 Antenna requirement ................................................................................................................. 12 6.2 Peak Power Measurement ........................................................................................................ 13 6.3 Frequency Separation and 20 dB Bandwidth ........................................................................... 15 6.4 Number of Hopping Frequency ................................................................................................. 17 6.5 Time of Occupancy (Dwell Time) .............................................................................................. 18 6.6 Conducted Spurious Emissions and Band Edges Test ............................................................. 20 6.7 Restrict-band Band-edge Measurements ................................................................................. 22 6.8 Radiated Emissions Measurement ........................................................................................... 24 6.9 Conducted Emissions ................................................................................................................ 34 6.10 Pseudorandom frequency hopping sequence .......................................................................... 37 7 TEST SETUP PHOTOGRAPHS OF EUT ................................................................................................................ 38 8 EXTERN…

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A n t e n n a t e s t r e p o r t C u s t o m e r N a m e : XU YUN P r o j e c t N a m e : M V 2 T - A01 D e s i g n e r : Z h an g Y a n g D a t e : 20 2 3 / 0 7 / 0 2 2 The customer name XU YUN Project Name Bluetooth Speakers Detailed abo e NO. project Detailed abo v e 1 spectrum BT 2 Project type The controller 2 Project type The controller 3 Antenna space area Fd it 4 F ee d po i n t type 5 The sensitivity 6 Type of antennaThe length 7 of the PCB board 8 note Debugging prototype RF Zhang Jun 18598019486 [email protected] 3 1 、 Test system and test equipment System Brand: MVG(SATIMO) measurement features: gain • pattern beamwidth cross polarization resolution sidelobe level 3D cavity reflectance at any polarization cavity reflectance (line or arc) antenna efficiency TRP, TIS, EIRP and EIS. Frequency band: StarLab 2402MHz-2480MHz The object under test Link antenna Test Equipment Antenna position bt antenna Efficient ( Lora+ WiFi ) PEAK GAIN LORA: Frequency range Efficiency(%) Gain(dBi) 2402M H z-2480M H z 20.05 -0.58 B T ~ B T 2402M H z -2480M H z 34.67 -0.58 Ef f i c i e n t ( 2 4 0 2 M H z - 2 4 8 0 M H z ) 2 4 0 2 M H 2402MHz z 2480MHz 2480MHz Y a Efficient

Dongguan Yaxu(AiT) Technology Limited Report No.: AIT23070701FW1 FCC ID: 2BB2E-A01 Page 1 of 42 Appendix A RF Test Data for BT(BDR/EDR) (Conducted Measurement) Product Name: Bluetooth Speakers Trade Mark: N/A Test Model: A01 Environmental Conditions Temperature: 25.9°C Relative Humidity: 52.3% ATM Pressure: 101Kpa Test Engineer: Simba Huang Supervised by: Seal Chen Dongguan Yaxu(AiT) Technology Limited Report No.: AIT23070701FW1 FCC ID: 2BB2E-A01 Page 2 of 42 Contents Page COVER PAGE 1 Duty Cycle....................................................................................................................................................................................... 3 1.1 Test Result .......................................................................................................................................................................... 3 1.2 Test Graphs ......................................................................................................................................................................... 4 2 Maximum Conducted Peak Output Power ....................................................................................................................................... 7 2.1 Test Result .......................................................................................................................................................................... 7 2.2 Test Graphs ......................................................................................................................................................................... 8 3 20dB Bandwidth ............................................................................................................................................................................ 11 3.1 Test Result ........................................................................................................................................................................ 11 3.2 Test Graphs ....................................................................................................................................................................... 12 4 Carrier Frequency Separation ....................................................................................................................................................... 15 4.1 Test Result ........................................................................................................................................................................ 15 4.2 Test Graphs ....................................................................................................................................................................... 16 5 Hopping Channel Number ............................................................................................................................................................. 17 5.1 Test Result ........................................................................................................................................................................ 17 5.2 Test Graphs ....................................................................................................................................................................... 18 6 Dwell Time .................................................................................................................................................................................... 19 6.1 Test Result ........................................................................................................................................................................ 19 6.2 Test Graphs ....................................................................................................................................................................... 20 7 RF Conducted Spurious Emissions ............................................................................................................................................... 22 7.1 Test Result ........................................................................................................................................................................ 22 7.2 Test Graphs ....................................................................................................................................................................... 23 8 Band-edge for RF Conducted Emissions ....................................................................................................................................... 29 8.1 Test Result ........................................................................................................................................................................ 29 8.2 Test Graphs ....................................................................................................................................................................... 30 9 Restrict-band band-edge measurements ....................................................................................................................................... 38 9.1 Test Result ........................................................................................................................................................................ 38 9.2 Test Graphs ....................................................................................................................................................................... 39 Dongguan Yaxu(AiT) Technology Limited Report No.: AIT23070701FW1 FCC ID: 2BB2E-A01 Page 3 of 42 1 Duty Cycle 1.1 Test Result Mode Frequency (MHz) Duty Cycle (%) 1/T (kHz) 1-DH1 2402 31.21 2.63 1-DH1 2441 31.21 2.63 1-DH1 2480 31.2 2.63 2-DH1 2402 32.01 2.56 2-DH1 2441 32 2.56 2-DH1 2480 32.01 2.56 Dongguan Yaxu(AiT) Technology Limited Report No.: AIT23070701FW1 FCC ID: 2BB2E-A01 Page 4 of 42 1.2 Test Graphs Test Graphs 1-DH1 2402MHz 1-DH1 2441MHz Dongguan…

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Page 1 of 2 FCC ID: 2BB2E-A01 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. Test Setup Photo Radiated Emission Page 2 of 2 FCC ID: 2BB2E-A01 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. Conducted Emission ------End------