Enjoy Wireless Streaming Music: This bluetooth adapter can connect to non-bluetooth car audio systems, home stereos, speakers, wired headphones via the 3.5mm AUX connector. The built-in Bluetooth 5.0 chip provides faster transmission, more stable connection and wider signal range. Smart Noise Cancellation: Using the latest CVC8.0 noise reduction and digital signal processor (DSP) technology, our Bluetooth audio receivers can cancel echoes and block intrusive background noises such as wind, traffic or crowds, giving you crystal clear Clear audio sound. UP TO 4 HOURS OF BATTERY LIFE: This AUX Bluetooth adapter can be used for calls or playing music for up to 4 hours. In addition, it can be used while charging, which is very convenient for listening to music on long journeys. Hands-free calling and navigation: Equipped with answer/redial/hangup/reject multi-function buttons, built-in microphone, allowing you to call hands-free. It also supports broadcasting voice announcements from satnav apps. No need to look down at your phone while driving.