COMPAN FOR NON-BLUETOOTH AUDIO DEVICES - This Bluetooth receiver connects to non-Bluetooth audio devices such as car radios, stereos, wired headphones and others via the 3.5mm AUX adapter. Simply pair it with your phone to start listening to your favorite music! Hands-Free Calling - The built-in microphone and MFB button allow you to answer, redial, hang up and reject calls, so to be able to speak hands-free. The Bluetooth adapter can pair with two devices at the same time, allowing you to easily switch between them for talking or listening to music. Bluetooth 5.0 and automatic connection - Equipped with Bluetooth 5.0 chip, the connection is stable, the transmission is fast, and the signal range is wider. Once paired, the car receiver will automatically reconnect to the last paired Bluetooth device as long as it is within wireless range. Advanced Noise Cancellation Technology - Using the latest noise cancellation technology CVC8.0 noise cancellation and a digital signal processor (DSP), the Bluetooth audio receiver gives you clear sound quality for your calls. Long battery life and charging type C - Up to 16 hours of use on a full charge. Fully recharges in 2.5 hours using the fast Type-C charging cable (included in the package). The kit includes: 1 x Bluetooth audio adapter (other items in the picture are props and are not included). Please note that 1 Dimensions are measured manually, there may be some error have 1-3cm error, hope you understand! 2 Due to the different monitor calibration, the color of the items shown in the photos may be showing slightly different on the monitor's monitor. your computer.