Enjoy Wireless Streaming MusicBluetooth receiver can connect to non-Bluetooth car audio systems, home stereos, speakers, and wired headphones via the 3.5mm AUX adapter. And built-in Bluetooth 5.3 chip for stable connection/fast transmission/wide signal range. Just pair it with your phone and start listening to your favorite music! (NOT fit for Bluetooth earphone) Intelligent Noise Reduction TechOur aux bluetooth receiver adopts the latest CVC8.0 Noise Cancellation and Digital Signal Processor (DSP) technologies, which can eliminate echo and block out intrusive background noise (such as wind, traffic, or crowds), providing you with crystal-clear calling sounds. Up to 16 Hours of Battery LifeThe working time of this aux bluetooth receiver is up to 16 hours when making calls or playing music. And it takes only 2.5 hours to fully charge the device by using 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 & NavigationA built-in microphone and one MFB button to answer / redial / hang up / reject calls, help you make hands-free calls. And the bluetooth adapter for car supports broadcasting voice notification from existed navigation App. You dont have to look down the phone on the move. Make sure you drive safely! Dual ConnectionThe portable bluetooth receiver can be paired with 2 devices at the same time. You can enjoy your music and never worry about missing any calls. Once paired, the car receiver will automatically reconnect to your last paired Bluetooth devices, as long as they are within the wireless range.