The transmitter adopts bluetooth, high-end CSR chipset, upgraded technology, which ensures that the high-definition sound transmitted by your bluetooth device is perfectly synchronized with the visual media, providing great entertainment for you to play games and watch. This adapter works with two devices at the same time, supports streaming music from TV/PC to two bluetooth headphones/speakers, great for watching TV and movies. The device is small and has a lot of connectivity options. In TX mode, allows you to connect legacy devices such as TV, CD player, DVD player, desktop, MP3, DAB radio, projector via 3.5mm aux, RCA or optical; as a receiver, you can connect to your home Stereo systems, Denon receivers, stereo amplifiers, HiFi systems, theater systems and wired speakers/headphones. Converts most non-Bluetooth devices to wireless. Built-in 450mAh rechargeable lithium battery, the battery life is more than 20 hours when transmitting and working, and nearly 25 hours receiving after fully charged for 2 hours. To save battery life, this adapter will automatically turn off after 10 minutes of disconnection as a receiver, but not as a transmitter. Lasts even while charging, so you can always enjoy your favorite wireless content.