Products like the VisorLite is fully duplex, you can speak and listen simultaneously. Multi-pairing of up to 5 phones. 8 hours standby time and up to 15 hours talk time complete with in car charger. The VisorLite instantly re-pairs to your mobile phone when you switch on the unit. It can also be used as a loud speaker for conference calls. Also features digital signal processor for built in noise cancelling and echo suppression VisorLite is the new sleek, portable, wireless hands-free in car solution. It is quick and easy to install onto the supplied car visor clip. The sprung loaded microphone also powers the unit on and off