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. To save battery life, this adapter will turn off Automatically after disconnecting 10 minutes as a receiver, but transmitter. It continuously using even while charging, enjoy your favorite wireless content all the time. Both the receiving mode and the transmitting mode can remember your devices which the last paired, you can bundle with Bluetooth headphone compatible Fast Stream codec (such as Z702), realize automatic link-back connection when the device are in range, the connected product has a memory function.