Fast Charging -- Features two USB ports and one Type-C port with 18W output, supporting QC3 fast charging. Allows simultaneous charging of three devices. Create a Musical Atmosphere -- Equipped with seven-color cool ambient lighting (red, orange, yellow, green, cyan, blue, purple). Supports Bluetooth stereo music playback and MP3/WMA/WAV/FLAC/APE music formats. Smart Chip Protection -- Provides effective protection against output overcurrent, input overvoltage, input undervoltage, output short-circuit protection, and input abnormal voltage warning. The dual display monitors car battery voltage in real-time to keep track of the vehicle's health status. Universal Vehicle Type -- Compatible with family cars, commercial SUVs, off-road sports cars, and 12V/24V trucks. Stable and Reliable -- Buckle-type splitter connectors offer full elasticity for a more stable and continuous power supply. Multifunction Button -- When playing music, press up/down to adjust volume and left/right to select tracks. For FM radio, press up/down to adjust volume, then press and hold the button after the frequency flashes, and press right to adjust the frequency.