All in 1 car FM transmitter for Iphone ,Ipod can connect with MP3, ... such as USB,SD card,MP3 .6.) Full frequency range , frequency range 87.5MHz---108MHz,7.)Blue backlight LCD can directly ... stable in different environment.12.) Full frequency range.13.) Memory for last frequency when power failure happen14.) With Ipod ... >=35dBOperation current20+/-3mAVoltage6~25VWeight45G Car FM transmitter for Iphone