Internal wiring administers a safe and consistent current output. Assists fast charging and concomitant transmission of data. Augmented tension points prohibit splitting of connectors. Besides, during the Bluetooth connecting, play the phone's music and FM transmitter to Car Audio, perfect, as calling incoming automatically switches to the speakers' state, call end then automatically back the music player. So you do not do any modifications, easily enjoying the music and hands-free phone calls while you are driving.