Features: 1. Support Dual-Device Connection, Automatic Reconnection, And Switch Between Phone And Music Devices At Will 2. Increase The Metal Microphone Design, Enhance Sound Collection, And Enjoy High-Fidelity Hands-Free Calls. Button Design, Easy To Use, Can Be Operated With One Hand 3. Colorful Ambient Light Design, Tf Card, Bluetooth Multi-Mode, Bluetooth 5.3, Enlarged Metal Microphone Design, Double-Sided Usb Port Design, Button Design 4. Enc Call Noise Reduction, Accurately Pick Up The Incoming Sound, High-Definition Call 5. Double-Sided Usb Port Design, No Need For Battery Front And Back Can Be Inserted, Easy To Install, Plug And Play, Easy To Use, Wired To Wireless In Seconds, Bass Subwoofer Switch Design Description: 1. Product Name: Bluetooth Receiver 2. Model: B-JR.CB6 3. Bluetooth version: V5.3 4. Audio decoding: AAC, 5. Supported protocols: HFP, A2DP, AVRCP 6. Support mode: TF card, bluetooth mode 7. TF capacity: maximum support 32G 8. Working frequency: 2402MHz.2483.5MHz 9. Maximum output power: 41dBm (EIRP) 10. Communication distance: 10m (barrier-free open environment) 11. Frequency response range: 20Hz.20KHz 12. Microphone sensitivity: .38dB2 13. Input interface: USB+AUX 14. Product power input: 5V1A size: about 57mm x 23mm x 8.8mm Material: ABS+PC colour: As shown Package Contents: 1 x Bluetooth Receiver 1 x Chinese And English Instructions Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.