HANDSFREE CAR KIT Production No:.H801 -- It can be used for most types of mobiles by choosing different adaptors. -- Automatically switched between handfree system and car stereo. -- Clear voice, no howling, effectively control the noise and echo. -- Auto-charge: when the mobile in a low battery, press the charge on/off power on the adaptor for charging. -- Auto-mute, auto-switch and auto-answering: when the call comes or you dial the number, The car stereo will auto-mute, and be switched to words, you can auto-answering by setting the mobile, when the talk finished, it will come back to the primary playing. -- Choose between speaker and earphone, to ensure your private talk. -- Professional installation, built-in design: compose standard mobile handfree system through connecting the car stereo power with speaker. -- DSP technology