This transmitter can transfer high quality stereo sound from smart TV, game box, TV Box, DVD to BT receivers like headphone, speaker, etc. And, it can transmit audio streaming to two BT devices at the same time so that you can share wonderful music with your intimate freely. Transmitting high definition music to BT receiver with three ways, 3.5mm AUX-in, optical(TOSLINK) digital and coaxial audio. So you can watch TV, movie, video and listen to high quality sound with perfect synchronization.