FeatureThe FM Transmitter enables you to play stereo quality sound from your mobile phone、 tablet PC and any other devices with a 3.5mm headphone socket to your car's FM radio or home stereo system. If you're sick of overplayed pop music、 boring ads and arrogant shock jocks、 ditch the radio and play your own tunes in the car with this FM car stereo transmitter! Just select any FM channel on the device and select the same FM channel on your car stereo and you'll be bopping to your own beat in no time Product Specification Frequency range: 20Hz ~ 20KHz  Separation: 60dB  Operating voltage: 4.2V 130MA  Operating current: 20mA ¡À5mA  Working time: more than 4 hours  Recharging voltage: DC 5V  Recharging time: 2 hours  Audio distortion degree: <2% (mod=75KHZ、 F=1KHZ)Clutter or harmonic: <-35db Package includes 1 ¡Á 3.5mm Jack FM Transmitter (without packing)  1 ¡Á Micro USB Cable  1 ¡Á User Manual