Car bluetooth receiver built-in microphone hands-free call automatic connection lossless sound quality Enjoy Wireless Streaming Music This car bluetooth adapter can be connected to non-bluetooth car audio system, home stereo, speakers, wired headphones via 3.5mm AUX adapter; and equipped with bluetooth 5.0 chip, stable connection / fast transmission speed / wide signal range. Just pair it with your phone and start listening to your favorite music Smart Noise Cancellation Technology Our bluetooth audio receiver adopts the latest CVC8.0 noise reduction and digital signal processor (DSP) technology, which can cancel echoes and block intrusive background noises (such as wind, traffic or crowds), providing you with crystal - Clear call sound effects. Up to 16 hours of battery life This secondary bluetooth adapter works for up to 16 hours while making calls or playing music. Fully charge your device in just 2.5 hours with a Type-C fast charging cable (included in the package). In addition, this Bluetooth music adapter can be used while charging, which is very convenient. Hands-free calling and navigation Built-in microphone and one MFB button to answer/redial/end/reject calls help you to make hands-free calls. And the Bluetooth audio adapter supports broadcasting voice announcements from existing navigation applications. You don't have to look down at your phone while on the move. Make sure you drive safely Dual Connection Portable Bluetooth Stereo Adapter can pair with 2 devices at the same time. You can enjoy your music without worrying about missing any calls. Once paired, the car receiver will automatically reconnect to your last paired Bluetooth device as long as they are within wireless range.