Handsfree Car Kit Wireless Radio Audio FM Transmitter MP3 Player  Introduction:LED Display the FM frequency\/trackSupport multipoint connections: can connect two phones at the same time.Excellent voice quality， use the DSP (digital signal process) technology to echo cancellationWith 3.5 mm line-in jack， support external audio devicesSupport 12-24V voltage from the car cigarette lighter Specification: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: 32GOperating system: Win XP\/Win vista\/Win7SNR\u226760dBCompatible Modes:iPod\/iPhone， Samsung， iPad， Nokia and other mobile devices How to use it:Using FM transmitter function:1)Plug the FM transmitter into your vehicle's cigarette lighter or power port2)Tune your radio to an unused FM frequency， then match with the same frequency of this product3)Insert a USB flash drive or Micro SD card which containing MP3 files into USB port or memory card slot of this product accordingly， it will play and transmit the MP3 files automatically4)Line-in function for: Use the included audio cable to connect an MP3\/Mp4 players or another external devices to the AUX input of this product. This item will play and transmit the music files of MP3\/Mp4 players or other external devices， and all functions of this item will be controlled by the external device Package included:1 x MP3 Player FM Transmitter Car Kit Charger1 x Audio cable1 x Remote Control(Battery is included) More detail: