Features:1 Support audio equipment with audio input: realize wireless audio reception and transmission2 Support automatic search to connect Bluetooth devices: realize transmission wireless audio transmission3 Built-in AEC echo cancellation and ANC noise cancellation circuit: gorgeous stereo, the sound quality is more pure and beautiful4 Built-in enhanced signal transmission circuit: fast and stable connection, continuous sound5 Compatible: dual lossless audio format6 Support: AUX OUT, Earphone7 Automatic memory connection function: simpler operation and more convenient connection8 Built-in battery: long battery life9 Bluetooth 21: low power consumption10 Real voice prompt: simple and clear operation11 Smart compatibility: Android, IOS system mobile phone and PAD, and all Bluetooth audio devices12 Support: Connect 1 mobile phone13 Simple product connection: no cumbersome driver and download APP1 Embedded ARM926EJ-S core, 4KB lcache and 4kB Dcache2 Support stereo codec3 Support HFP, HSP, A2DP, AVRCP, and SPP configuration files4 Noise reduction and echo cancellation5 Multi-band equalizer configuration6 Support packet loss concealmentProducts from Botao's store