Connected the bluetooth stereo transmitter to your TV， DVD & MP3 player through 3.5mm audio jack. Switch on your bluetooth stereo transmitter， pairing with your bluetooth music receiver with your phones / tab...Red-blue flashing light shows Not connected， blue light flashing shows ConnectedBuild-in lithium-ion battery， work time 24 hours approx.Support bluetooth A2DP V1.2 protocolWorking distance: 10 metres(approx. 33 ft)Dimension: 60x35x15mmComes with a 3.5mm audio cable and mini USB cablePackage includes:1 x Bluetooth Music Transmitter1 x 3.5mm Audio Cable1 x Mini USB Cable