Fangrui Product Details 1. Joyroom Jr-cb3 Bluetooth 5.3 Car Wireless Receiver 2. Bluetooth 5.3 Technology, Low Latency, Stable Connection Within 30 Meters. 3. Simple Installation, No Battery Required, Plug And Play, Easy To Use. 4. The Design Of The Night Vision Colorful Ambient Light Circle Makes Driving At Night Easier And Safer. 5. Double-mark Enc Call Noise Reduction, Accurately Pick Up Human Voice, High-definition Call. 6. Independent Button Design, Easy To Use, Can Be Operated With One Hand. 7. Support Dual-device Connection, Automatic Reconnection. 8. Support A2dp And Sbc Protocol, Not Controlled By Cables, Enjoy Hifi Stereo Sound Effect. 9. Parameters: 10. Bluetooth Version: V5.3 11. Audio Decoding: Sbc 12. Supported Protocols: Hsp, Hfp, A2dp, Avrcp 13. Support Mode: Bluetooth, Tf Card 14. Transmission Range: Less Than Or Equal To 12m 15. Frequency Range: 20hz-20khz 16. Microphone Sensitivity: -38+-2db 17. Product Input: 5v 1a 18. Input Interface: Usb+aux 19. Material: Abs+pc 20. Size: 40.5mmx45.7mmx11.4mm 21. Net Weight: 40g