CONVENIENT LED SCREEN DISPLAYThis Bluetooth receiver has a clear LED screen that shows the real-time remaining power and volume levels. You can easily check the battery percentage by clicking the MCF button, and adjust the volume by tapping +/-. It will remind you to charge in time so you can enjoy music without interruption.BREAKTHROUGH BLUETOOTH 5.3 TECHEquipped with the latest Bluetooth 5.3 chip, our Bluetooth car adapter improves the transmission delay and connection defect issues of the old Bluetooth version. It gives you a faster, more stable, and smarter connection for seamless sound and lossless music. It also has a memory function that can auto-reconnect to the last used device every time you turn it on.CLEARER HANDS-FREE CALLSOur Bluetooth aux adapter gives you a realistic and clear call sound. It has a built-in microphone for good sound pickup, and CVC8.0 noise reduction technology to filter out echoes and background noise. You can answer/redial/hang up/reject calls with the multi-function button, freeing up your hands. Broadcasting from navigation Apps, the Bluetooth stereo receiver also ensures safe driving!LONG LASTING & FAST CHARGINGThis Bluetooth audio receiver has a working time of up to 12 hours no matter making calls or playing music. Using the included USB charge cable, it takes just 2 hours to fully charge the device. In addition, this Bluetooth audio adapter can also be used while charging. Beautiful music will accompany you throughout your journey!EASY TO USEAll you need is a 3.5mm AUX-IN port in your car. This AUX Bluetooth Adapter for car is easy to use, no radio frequency needed. Just plug it into your cars auxiliary input, pair it with your smartphone, and enjoy music and calls. If the portable Bluetooth audio receiver is connected to 2 devices simultaneously, please pause the current device and play the other one to switch the music source.