brand new and high quality Features Double lossless audio formats compatible Built-in enhanced signal transmission circuit, connected faster and more stable Automatic memory connected function; the operation is easier, more convenient Built-AEC for echo cancellation and noise cancellation circuit ANC, gorgeous stereo sound more pure Compatibility: for phones and PAD of Android/IOS system, and all Bluetooth-compatible audio devices Description Playing time: up to 8H Bluetooth-compatible distance: 10M Charging way: Micro USB 5V/0.5A Input/Output connection: 3.5MM stereo audio port Built-in ARM926EJ-S core,4KB lcache and 4kB Dcache Support stereo codec Support HFP, HSP, A2DP, AVRCP, and SPP profile Noise reduction and for echo cancellation Multi-band equalizer configuration Support packet loss concealment Multi-point HFP and A2DP Support voice prompts Integrated Li-Type battery charger and support 300 mA fast charge and over-discharge for protection Support all audio equipment with audio input interface, realize wireless audio receiver transmission Support automatic search for Bluetooth-compatible devices to realize connect, transmit wireless audio transmission Built-AEC for echo cancellation and noise cancellation circuit ANC, gorgeous stereo sound more pure Built-in enhanced signal transmission circuit, connected faster and more stable Double lossless audio formats compatible Support AUX OUT,Earphone Automatic memory connected function; the operation is easier, more convenient Built-in battery, long standby Bluetooth-compatible 2.1Consume low power Live voice prompts, simple and clear operating for Smart compatible Android, IOS phone system and PAD, and all Bluetooth-compatible audio devices Support connect a mobile phone Easy connection,No Need APP and Drivers Size:9.5*5.5*1cm Quantity:1Set(Not include the phone) Note: Please allow1-2cm error Due to the difference between different monitors, the picture may not reflect the actual colorof the item. Thank you!