... effect. 3.holder function. 1, high-fidelity, high resolution DIGITAL stereo effect. PLL lock-in technology 2. LCD screen ... 5, with power save feature that sends RF point 6. cigarette lighter power supply 7, 3.5mm audio input ... interface for portable CD, MD, MP3, MP4, PDA, PC, IPOD, ... with remote control; you can control the IPOD IPHONE music and its frequency