... , high resolution DIGITAL stereo effect. 3.holder function. 1, high-fidelity, high resolution DIGITAL stereo effect. PLL ... sends RF point 6. cigarette lighter power supply 7, 3.5mm audio input interface for portable CD, ... audio plugs 9, with USB interface, with charging function (direct to MP3 power supply or battery charging) ... the IPOD IPHONE music and its frequency 7 in 1 Car Kit for IPod-iPhone P37