Features:brand new and high qualityBluetooth-compatible music transmitter is to send audio signals of TV, DVD, MP3 and other playback devices to Bluetooth-compatible receiver, Bluetooth-compatible headset or Bluetooth-compatible speaker, so as to realize wireless home life.No need to install any software and very easy to use.Bluetooth-compatible stereo transmitter does not require batteries.Support A2DP (advanced audio distribution) and arvcp (audio/video remote control).Support paired Bluetooth-compatible stereo headset/headphone to control for play/pause, forward/backward. Specifications:Bluetooth-compatible Version v2.1.Support pairing Pin Code: 123400008888,Frequency Range: 2.42 to 2.480 MHz (analog) spectrum.Support Auto Standby: the stereo bluetooth-compatible headset/headset that starts to rescue in standby mode is not found in for time.Frequency Range: 2.42 to 2.480 MHz (analog) spectrum.Working current: 40mA (maximum).Connector: 30pinMaterial:ABSColor:Black/ White (Optional)Support Automatic Pairing (no buttons) Size: approx 4x4x8cm/1.57x1.57x3.14in Note:Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand.Please allow 0-1cm error due to the manual measurment. Package includes:1 x Bluetooth-compatible Transmitter1 x English Manual