3.5mm In-car Music Audio FM Transmitter Car Kit LCD Display Mini Wireless Transmitter For Android iPhoneFM Transmitter for mobile phonesMP3/MP4 players.Hands free talk function offer you more safety during driving.LCD displayers frequency with backlight.With Touch key design, high fidelity stereo.Digital PLL, transmission is stable in different environments.Full frequency range.Memory for last frequency.Powered by rechargeable built-in lithium battery, do not need to use the iPhones power.Blue LCD backlight display.Frequency Range: 87.5 - 108MHz/StepCable Length: 30cm/11.81 (Approx.)Effective Range: 10m (Approx.)Voltage: 5VColor: Black1 x FM Transmitter1 x USB to Micro USB Cable