... iphone 2.5V,1.5A input 3.Hansfree,fm transmitter 4.LED display 5.Power switch Features ... and function:fm transmitter car charger car holderIn-car holder and FM transmitter for iPhone3Gs,4Gs, ... mini wireless earphone for private calling Drive-by-WireFull FM frequency from 88.1-107.9MHzLED displayAuto Scan ChannelHI ... holder for iphone,5V,3A with handsfree,fm transmitter function,HC-13