This device supports Bluetooth-compatible hands-free calling with echo and noise cancellation during calls With 2 USB and 1 Type-C port, providing an output current of 3.1A It also features stereo Bluetooth-compatible and FM transmission technology, supporting U-disk reading and Bluetooth-compatible playback Support music in MP3/WAV formats With an automatic power-off memory function Powered via the cigarette lighter socket with a DC12V-24V voltage supply It has a voltage detection function With colorful ambient light, cool and beautiful Specification: Weight: 47.1g FM transmitting frequency: 87.5-108Mhz Bluetooth-compatible version: 5.3 Input voltage: 12V-24V Package included: 1 x Bluetooth-compatible Car Charger MP3 Player 1 x English User Manual