Enjoy hands-free calls with a stable connection. Echo reduction minimizes background noise for clearer hands-free conversations – just press the button to answer calls. Bluetooth provides a more reliable and faster connection, allowing you to make calls, play music, or get directions without constant disconnections. This Bluetooth FM transmitter also supports voice assistance. Broad Compatibility: This Bluetooth FM transmitter for cars pairs with any Bluetooth-enabled device as a hands-free kit. Bluetooth connects to your car radio via FM channels, and you can play music on your car stereo from your Bluetooth device/USB. Built-in over-current/over-heating/short-circuit/over-voltage/high-temperature protection ensures stable power output. Widely Used: When playing music, adjust the volume by rotating the knob to the right for a longer time to increase, and to the left for a longer time to continuously decrease the volume. Short press the knob while playing music to play/pause. Suitable for most car models.