Description:Size: 8.0 x 7.0 x 3.2cmPackage weight: 2.1 oz/61gThe audio cable length: 70cmFrequency range: 87.5-108.0MhzOutput Frequency: 20Hz-15KHzSupply voltage: 12-24VRated current: 90mAPower consumption: 1WWork temperature: 0-50 degreesSupport file format: MP3/WMAUSB Charge output: 5V/2.1AMusic format: MP3 formatUSB Maximum support: 32GMicro SD Maximum support: 32GTransmit distance: 10mOperating system: Win XP/Win vista/Win7/8SNR≧60dBPackage Included:1 x MP3 Player FM Transmitter Hands-free Car Kit Charger1 x Audio cable1 x User Manual