Features: Play your TV, DVD MP3 player music on the BT music receiver, BT headset headphone, BT speaker etc. Connected the BT stereo transmitter to your TV, DVD MP3 player through 3.5mm audio jack. Switch on your BT stereo transmitter, pairing with your BT music receiver, BT headset headphone, BT speaker etc. Red-blue flashing light shows Not connected, blue light flashing shows Connected Build-in lithium-ion battery, work time 24 hours approx. Support BT A2DP V1.2 protocol. Comes with a 3.5mm audio cable and mini USB cable.