Features: The USB port is for fast charging,delicate and convenient. Easily make crystal clear hands-free calls with noise cancellation technology. Bluetooth transmitter only perfectly works with for cellphones bluetooth. Special design: Large key for easy operation; backlight display for optimal viewing comfort. Adopted advanced interference and noise cancellation technology. Built-in microphone feature supports hands-free talking reduce interference. Description: Intelligent and fast charging: input 12-24 V. Output USB ports: smart 2.4 A max charge port. Size: 1.1 inch. Color: Black. Material: ABS. FM frequency: Modulation function. PC interface type: USB. Size: 1.1 inches. Power supply: Voltage 12-24 (V). Power mode: Cigarette lighter type car MP3. Color: Black. Bluetooth: 5.0. Support: USB/micro SD. <span style="color:rgb(255, 0, 0);font-siz