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.<br> 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.<br> 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.<br> 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.<br> Very tiny size. You can take this Bluetooth audio receiver transmitter whenever you go. Very good companion for drivers.<br> The actual object may have color difference due to different light or display<br> Colour:Black<br> Material:ABS+Aluminum alloy<br> Package Contents:<br> 1x Bluetooth adapter<br> 1x audio cable<br> 1x charging cable<br> 1x audio adapter<br> Only the above package content, other products are not included.<br> 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.