BasAcc In Car Universal Wireless FM Transmitter with Hands-Free Function & USB Travel Car Charger Compatible with Apple iPhone 7/7 Plus, Samsung S9/S9+/S8/S8+, Any Audio Player with 3.5mm Jack (Black) With the advanced FM transmission technology, you are able to transmit your music or voice call wirelessly through FM radio from your device to the car stereo system. Extra USB charging port to charge your device on the go. Extra 5V 1 Amp USB charging port to charge your device on the go. Universal compatible with all audio devices with 3.5 mm jacks with a easy-to-read display and user friendly button controls. Frequency range: 88.1-107.9Mhz(0.1Mhz/step); Effective distance: 16 feet/ 5 meters. User manual included.