Enjoy Wireless Music Streaming: This Bluetooth receiver adds Bluetooth functionality to a variety of non-Bluetooth devices via a 3.5mm AUX cable, such as non-Bluetooth car audio systems, stereos, speakers -speakers, wired headphones. Just pair it with your phone to start enjoying high quality music HI-FI Music and Ultra-Clear Calls: Our car bluetooth adapter adopts professional HD audio decoder, allowing you to enjoy high quality music streaming. CVC8.0 noise cancellation technology helps eliminate echo and block out intrusive background noise for crystal clear calls. Hands-Free Calls and Navigation: One microphone built-in allows hands-free calls and an "MFB" button allows you to answer, hang up or reject calls. This Bluetooth auxiliary jack also supports voice notifications from existing navigation apps. No need to look at your phone, which ensures safe driving Bluetooth 5.0 and Dual Paring: Upgraded Bluetooth 5.0 chip is built-in for stable connection and fast transmission. The bluetooth jack is compatible with most bluetooth devices, such as smartphones, iPads, laptops, etc. Support 2 Bluetooth devices simultaneously connection, just pause the currently playing device and play the other one to switch music source. Long Battery Life and Charging Type-C: This car Bluetooth receiver works up to 16 hours in normal use. And it can be fully charged in just 2.5 hours using the Type-C fast charging cable (included in the package). More convenient, this Bluetooth music adapter can also be used for charging. PS: If the battery is full, the indicator will not light up when trying to charge.