Featuer: Precise structural design USB3.1A charger, Bluetooth version 5.0 Support charge while listening to songs Support power and memory function The screen can show the frequency Support Bluetooth/TF card/U disk player, Bluetooth hands-free calling This product adopts FM full-frequency wireless transmission technology and can directly read the audio files in the mobile phone Bluetooth/TF card/U disk. Supports Bluetooth audio playback and Bluetooth hands-free calling. Support intelligent APP function, lossless high-quality audio decoding; usb car charging function in a multifunctional car MP3. Noise cancellation function, built-in noise cancellation circuit, make the call sound clearer Out Power : As description Material Type : ABS Item Type : FM Transmitters Voltage : 12-24V Special Features : Handsfree Item Size : 35*45*75mm Support Car Voltage display : Reminder Voltage low Support Handsfree Call : Bluetooth Handsfree Build in microphone : Hands free talking Car Kit Bluetooth FM Transmitter : Transmissor FM Bluetooth