Bluetooth 5.3 FM Transmitter for Cars is an enhanced dual mic for clearer calls and fast charging capabilities. Equipped with a PD 30W Type-C and QC3.0 18W USB charging port, this adapter can fast charge two devices simultaneously. The transmitter uses the latest Bluetooth 5.3 technology, optimizing the transmission delay and connection issues of older Bluetooth versions. The device is compatible with most smartphones and Bluetooth-enabled devices and fits 12-24V car cigarette lighters. To get the best sound quality, tune the car radio to an UNUSED STATION (supporting 88.1-107.9 Mhz), pair the FM transmitter with car radio channel, and pair your phone with the FM transmitter via Bluetooth.