9 in 1 fm transmitter with car charger for iphone 4 compatible with all iPhone/iPod any phone with 3.5mm audio plug ---Compatible with all iPhone & iPod & MP3/MP4 or any phone with 3.5mm audio plug ---USB port for charging ---Full Band FM Radio transmitter ---Handsfree for iPhone 3G/3GS and all cell phone with 3.5mm plug ---Universal car holder Play, charge and cradle your iPhone 3G / iPod with one simple, secure device Two Dimensional Tuning Technology (TDTT) – scans radio frequency quicker and more accurately, rapidly switches from coarse tuning to fine tuning Wireless remote controller Transmits music to your car's FM stereo Uses any available FM frequency from 87.5 to 108.0 LCD Digital Display on FM Transmitter Charges iPhone 3G / iPod while securely cradled No install necessary - simply plugs into any available auto power outlet 10 Presets so you can jump to commonly used frequencies Aux-Input lets you connect and transmit iPod shuffle and any other MP3 player, laptop or game system over your car stereo