The Bluetooth Aux receiver can turn your old car audio/home audio/3. 5mm wired earphones/speakers into wireless. Compatible with most Bluetooth-enabled devices, such as smart phones, tablets, laptops, and computers. This Bluetooth AUX Adapter can pair with Bluetooth devices and the built-in microphone can be used to answer hands-free calls. One key to answer, reject, end and redial the last number. Designed with volume up/down button, it is very convenient to adjust the volume of music. The Bluetooth receiver equipped with Bluetooth 5.0 to stable connection. The bluetooth range up to 33ft without obstacles. Automatically connects to the last connected device. One key to power on and enter pairing mode. The built-in battery has a long battery life and can support up to 16 hours of use after full . Fast charging and can be fully within 2 hours. Very tiny size. You can take this Bluetooth audio receiver transmitter whenever you go. Very good companion for drivers. The actual object may have color difference due to different light or display Colour:Black Material:ABS+Aluminum alloy Package Contents: 1x Bluetooth adapter 1x audio cable 1x charging cable 1x audio adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.