1. Support audio equipment with audio input: realize wireless audio reception and transmission. 2. Support automatic search to connect Bluetooth devices: realize transmission wireless audio transmission. 3. Built-in AEC echo cancellation and ANC noise cancellation circuit: gorgeous stereo, the sound quality is more pure and beautiful. 4. Built-in enhanced signal transmission circuit: fast and stable connection, continuous sound. 5. Compatible: dual lossless audio format. 6. Support: AUX OUT, Earphone. 7. Automatic memory connection function: simpler operation and more convenient connection. 8 Built-in battery: long battery life. 9. Bluetooth 5.0: low power consumption. 10. Real voice prompt: simple and clear operation. 11. Smart compatibility: Android, IOS system mobile phone and PAD, and all Bluetooth audio devices. 12. Support: Connect 1 mobile phone. 13. Simple product connection: no cumbersome driver and download APP. Embedded ARM926EJ-S core, 4KB lcache and 4kB Dcache; Support stereo codec; Support HFP, HSP, A2DP, AVRCP, and SPP configuration files; Noise reduction and echo cancellation; Multi-band equalizer configuration; Support packet loss concealment.