Charges two devices simultaneously while the LCD screen displays charging status in amps, battery voltage, and low voltage audible alarm. The total output 4.8A load is split 2.4A per side as needed. Constructed of stamped stainless steel and injection molded nylon. Output DC 5V/4.8A. Input 12-24VDC. Blue LED display. A 1-1/2" B 1-1/4" C 2-13/16" D 13/16"