Product Model: C28 Bluetooth Audio Receiver Transmitter 2-in-1 The product has the following functions and features: Bluetooth 5.0 technology: Using the latest Bluetooth 5.0 technology, it has faster transmission speed and more stable connection, and can be paired with a variety of devices. Receiving and transmitting mode: It can be used as an audio receiver to connect to TVs, computers, projectors and other equipment, and can also be used as an audio transmitter to connect to vehicles, speakers, earphones and other equipment to achieve two-way audio transmission. Hands-free calling function: Support hands-free calling, which is convenient for you to talk while driving and improves safety. Long battery life: The built-in battery can provide up to 4 hours of battery life, allowing you to continue to enjoy audio fun in a mobile environment. Plug and Play: Easy to use, just plug the C28 into the AUX interface of the device, and you can start using it immediately without additional settings. Lossless sound quality: Support lossless sound quality transmission to ensure high-fidelity restoration of audio. In general, the C28 Bluetooth audio receiving and transmitting combo has a variety of connection methods and rich functions. It is suitable for audio transmission of computers, TVs, projectors and other equipment, and is also suitable for receiving equipment such as cars, speakers, and earphones. mode used.