Features: New high quality. USB 3.1A dual charging ports enable charging while listening to music. Bluetooth version 5.0 supports Bluetooth audio playback, voice navigation, and hands-free calling. Supports Bluetooth and USB disk with plug-and-play functionality. Full frequency FM wireless transmission technology can directly play audio files from a Bluetooth mobile phone or USB disk. The LED display screen monitors voltage in real time for safer driving. Supports power-off memory function. Built-in smart chip provides multiple protection functions including overload, overheating, overvoltage, short circuit protection, and anti-burn features for safer operation. Compatible with all vehicles operating at 12V24V. Specifications: Material: ABS Bluetooth version: BT 5.0 Effective distance: 10M Charging interface: USB 3.1A + 1.0A Charging current: 5V/3.1A, 5V/1.0A Voltage: 1224V Transmission frequency: 87.5MHz108.0MHz Functions: Dual USB charging, USB flash disk, FM transmission, Bluetooth music, hands-free call, Bluetooth navigation, LED voltage detection File types supported: MP3, WMA, WAV, FLAC Compatible models: 12V24V vehicles, SUVs, trucks Color: Black