Enjoy Wireless Music Streaming: The Bluetooth receiver can be connected to non-Bluetooth car stereo systems, home stereo systems, speakers, and wired headphones via the 3.5mm aux adapter; and is equipped with a Bluetooth 5.0 chip for stable connection, fast transmission, and a wide signal range. Simply pair it with your phone and start listening to your favorite music! Intelligent Noise Reduction Technology: Our auxiliary Bluetooth receiver uses the latest CVC8.0 noise reduction and Digital Signal Processor (DSP) technologies, which can eliminate echo and block intrusive background noise (such as wind, traffic, or crowds), providing you with crystal-clear call sounds. Up to 16 Hours of Battery Life: The working time of this auxiliary Bluetooth receiver is up to 16 hours when making calls or playing music. And it only takes 2.5 hours to fully charge the device 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: A built-in microphone and \"MFB\" button to answer/redial/hang up/reject calls help you make hands-free calls. And the Bluetooth car adapter supports voice prompts from the existing navigation app. You don't need to look at the phone when you're on the road. Ensure safe driving! Dual Connection: The portable Bluetooth receiver can be paired with 2 devices simultaneously. You can enjoy your music and never worry about missing any calls. After pairing, the car receiver will automatically reconnect to your last paired Bluetooth devices as long as they are within wireless range.