Description: Features: brand new and high quality. 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. Automatic memory connected function, the operation is easier, more convenient Built-in battery, long standby. 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 APPs and drivers. bulti-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 Multi-point HFP and A2DP Support voice prompts No matter Transmitter mode or Receiver mode,only can connect one Bluetooth-compatible device at a for time. Specifications: Material: Plastic Color: Black Size: 5.531cm/2.171.180.39in (Approx.) 3.5mm aux cable length: 50cm/19.69in (Approx.) Micro USB charging cable length: 50cm/19.69in (Approx.) Supported protocol: A2DP, AVRCP, HFP, SPP HID receive working current: 50MA send working current: 120MA standby current: 30MA Max Charging current: 300MA Bluetooth-compatible range: 10M charge methods: Micro USB 5V/0.5A Output connection: 3.5MM stereo audio port Input connection: 3.5MM stereo audio port Compatibility: for phones and PAD for Android/IOS system, and all Bluetooth-compatible audio devices. Quantity: 1 Set (other accessories demo in the picture is not included) Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 X Bluetooth-compatible Transmitter Receiver 1 X 3.5mm Aux Cable 1 X Micro USB Charging Cable 1 X User Manual