FM Transmitter - THZY Wireless FM Transmitter Radio Car Kit with 3.5mm Audio Plug and Car Charger for Smartphones Auto-scan to find an empty station to connect to a device and transmit audio. Play audio devices and smartphones through your car stereo system with 3.5 mm jack. Comes with an extra USB port to charge your cell phones, GPS and other digital devices while driving. Features a high-contrast, easily-read display and prominent button controls Simply plug in your audio device through 3.5mm jack, autoscan or manual to select and set a ramdon FM channel, and tune the car FM audio to that channel. Allows hands-free phone conversation through the car stereo. Long-lasting Li-battery ensures long hours of listening pleasure