Smart IC for auto-voltage detection 1-port USB for simultaneous charging 3-port full function car socket 3.1A high capacity ampere for fast charging Easy On/Off switch control with LED indicator Voltage warning flash-display under 12V Overvoltage and overcurrent safety protection Specifications: Input: DC 12 to 24V USB output: 5V, 3.1A (total) USB output breakdown: 2.1A, 1A Socket output: DC 12~24V Power: 100W (max) Safety fuse: 10A Dimension: 92*52*32mm Color: Black. Package included: 1 x Car charger 1 x manual