Compatibility: The Bluetooth FM transmitter is compatible with a range of Bluetooth-enabled devices, including smartphones, tablets, and MP3/MP4 players through a 3.5mm audio jack.Music Playing: The device supports music playing through various modes, including Bluetooth, TF card, and Aux, and offers a 21-key remote control for ease of use. It supports MP3/WMA format and has 206 channel options ranging from 87.5-108.0MHz.Wonderful Performances: The Bluetooth FM transmitter features a microphone with noise suppression (CVC) technology that offers crystal clear calls. It also supports answering/redialing/dismissing or ending calls with the press of a button, seamlessly switches between incoming calls and music, and offers voice navigation of your phone.Charging: The Bluetooth FM transmitter has a 5V-1A charging port to charge most USB devices, including Apple and Android smartphones and power banks, providing better charging performance.Portable and Large Screen: The Bluetooth FM transmitter is lightweight, compact, and offers overload, short-circuit, and overvoltage protection. Its 1.4-inch LED screen can display incoming call phone numbers and song names playing through TF cards.