The transmitter utilizes Bluetooth, an advanced CSR chipset, and upgraded technology, ensuring that high-definition audio transmitted by your Bluetooth device is perfectly synchronized with visual media, providing fantastic entertainment for gaming and watching. This adapter works with two devices simultaneously, supporting streaming music from TV/PC to two Bluetooth headphones/speakers, perfect for watching TV and movies. This compact device offers numerous connectivity options. In TX mode, you can connect older devices like TVs, CD players, DVD players, desktop computers, MP3 players, DAB radios, and projectors 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. It converts most non-Bluetooth devices into wireless ones. Featuring a built-in 450mAh rechargeable lithium battery, the battery life exceeds 20 hours for transmitting and working, and nearly 25 hours for receiving after a full 2-hour charge. To conserve battery life, this adapter automatically shuts off after 10 minutes of disconnection as a receiver, but not as a transmitter. It also operates while charging, so you can always enjoy your favorite content wirelessly.