Features&Specification:1. Touch key design， LCD display.2. High fidelity， digital PLL makes the transmisson stable in different environments.3. Full frequency range， up to 200 for choice.4. Memory for last frequency.5. Powered by rechargeable built-in lithium battery， do not need to use other equipments' power.6. Compatible For iPod/iPhone 5G/4S/4G/3GS/3G， Sumsang Galaxy S3/S4， MP3/4 players and other mobile phones.7. Wireless signal distance: Max. 10 meters app.8. Headphone plug: 3.5mm Male9. Dimension: 59 x 20 x 10mm app.10. FM Frequency Range: 87.5-108.0MHZ Operation instruction:1. Connect this transmitter devices to the compatible device.2. Turn the transmitter's FM frequency to the same as the car radio， or turn the car radio FM frequency to the same as this transmitter.3. Adjust the volume of these two devices to a suitable level you need.4. Play the music or answer the calling at the phone's side.Package include:1 x Wireless FM Transmitter1 x USB Charging CableNote: The retail box is not include!!! If you really need it， please find seller for help!!!