2 In 1 Amplifier AUX Bluetooth 5.4 Audio Adapter 1. Bluetooth version: 5.4 2. Built-in noise reduction HIFI sound quality 3. Transmission signal distance: 0-15m 4. Fully compatible with automatic matching 5. Input interface: 3.5mm 6. Input voltage: DC5V 7. Battery capacity: 1000mah 8. Charging time: about 2 hours 9. Charging interface: Type-c 10. Signal-to-noise ratio: 95db 11. Playback mode: BluetoothU disk playback 12. Operation mode: button switchingremote control 13. Support independent button adjustment: volume adjustment, music switching, support infrared remote control, support U disk music playback (can directly play Mp3WAV music files in U disk) 14. Built-in high-performance antenna, easy to achieve wireless transmission, receive Bluetooth signals, and transmit to wired audio through Bluetooth connection 15. The button setting can easily adjust the previous and next songsvolume, and the conversion is widely compatible and unrestricted, so you can use it as you like. 16. You only need a 3.5mm audio cable to turn it into a Bluetooth speaker and enjoy wireless music. 17. Equipped with an infrared remote control, soft silicone panel, indoor and outdoor distance within 10 meters, supporting various functional operations. 18. High-performance Bluetooth 5.4 chip, compatible with multi-protocol transmission, faster, clearer and more stable output. 19. Built-in 1000mAh large capacity, ultra-long standby, enjoyable listening to music, strong battery life, up to 40 hours of listening to music, through safety certification, longer service life. Packing list: - Host x 1 - 3.5mm audio cable x 1 - RCA cable x 1 - Charging cable x 1 - Instruction manual x 1 - Remote control x 1