Bluetooth 5.3 Audio Amplifier Receiver Supports USBMP3 Playback 1. Bluetooth solution: 5.3 EDR, A2DP, HSP, AVRCP 2. Frequency: 2.4GHz-2.48GHz 3. Power supply voltage: DC 5V (without built-in battery) 4. Bluetooth receiving function: connect to a mobile phone 5. Support reading U disk to play 6. Bluetooth transmission distance: 10m 7. Support Bluetooth hands-free call function 8. Support Bluetooth dual channel 9. Frequency: 2.4GHz 10. Working voltage: 5V 11. Interface: 3.5mm stereo input jack 12. Power supply: charge with mini USB cable 13. Working time: up to 5 hours 14. Interface type: AUX, optical fiber, RCA, U disk 15. Basic functions: Bluetooth reception, U disk playback 16. Supported equipment: mobile phones, tablets, computers, speakers, power amplifiers, etc. 17. Equipped with high-performance Bluetooth 5.3 chip, low-loss data transmission, fast response, stronger anti-interference, bid farewell to delays, freezes and other problems 18. AUXRCA red and white lotusdigital optical fiberU disk, to meet the needs of different equipment and different audio interfaces 19. Connect the audio interface of the old speaker or power amplifier to solve the problem that the speakerpower amplifier does not have Bluetooth and cannot use Bluetooth to play 20. Support U disk playback, plug and play, no driver required 21. Built-in signal gain amplifier, room connection without dead angle 10 meters transmission sound quality without delay, stable signal without lag