Transmitter utilization Bluetooth, high-end CSR chipset, upgrade technology, ensures high-clarity sound delivered by your Bluetooth device in prefect synchronization with visual media, providing you great entertainment in playing games and watching. This adapter can work with two devices simultaneously, support transmission music from TV/PC to two Bluetooth headphones/speakers, ideal for watching TV and movies. This device is very small, has a lot of connections options. In TX mode, allow you connect old style devices, such as TV, CD Player, DVD Player, Desktop, MP3, DAB radio, Projector via 3.5mm aux, RCA or optical; As a Receiver, allow you connect to home stereo system, Denon receiver, stereo amp, HiFi system, cinema system and wired speaker/headphone. Turns most devices that’s non-Bluetooth to wireless ones. Built-in 450mAh rechargeable lithium battery, the battery life on transmit working over 20 hours with Audible volume, on receive nearly 25 hours after 2 hours fully charged.