Features: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 2 1: 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 Description:1 Embedded ARM926EJ-S core, 4KB lcache and 4kB Dcache 2 Support stereo codec 3 Support HFP, HSP, A2DP, AVRCP, and SPP configuration files 4 Noise reduction and echo cancellation 5 Multi-band equalizer configuration 6 Support packet loss concealment