No LED indicator light to drain the battery when not in use. Charges 2 devices simultaneously. The total output 4.8A load is split 2.4A per side as needed to charge phones, pads, and tablets. Protective dust cap extends the life of the charger. Injection molded nylon with terminal spade contacts. Easily installs in a 1-1/8" hole. A 1-7/16" B 1-1/2" C 1-1/16" Input 12-24V Output 5V DC/4.2 Amps