3.5mm FM Transmitter + Car Charger Wireless Radio Adapter for CellphoneTalk、 Charge and Play music on the go!Perfect audio transmission function.Compatible with virtually any Smart Phone and MP3 / MP4.Provides hands-free conversations through your car speakers (need to connect with 3.5mm audio).Full frequency range design effectively avoids interruption.With a Micro USB 5pin port for charging Samsung Galaxy S4、 S3、 Note 2、 HTC、 Motorola、 Android SmartPhone、 etc.USB output charging for Mobile Phones、 GPS、 and other devices (USB cable is not included).Specifications:Radio type: FM frequencyFrequency range: 88.1-107.9MHzInterval: 0.1MHzStability: 10ppm (-10 ~ 55 degree Celsius)Clutter & harmonic: Below -60dBEffective range: Approx. 5mWorking voltage: DC 5VUSB output voltage: DC 5V 800mAStereo separation: 40dBFrequency response: 20Hz~16KHzAudio distortion: Below 0.1% (F=75KHz、 f=1KHz)SNR: Above 45dB (1KHz 100%)Item weight: 45g / 1.6ozPackage size: 17.3 * 9 * 3cm / 6.8 * 3.5 * 1.2inPackage weight: 71g / 2.5ozItem total length: Approx. 75cm / 2.46ftPackage list:1 * FM Transmitter with car charger (phones are not included)1 * User's manual