Atomi Charge Station 3-Port USB Desktop Charger Multi-Charge: Conveniently charge up to three devices all at once Rapid Charging: Get a full charge faster and save hours of time Charge Indicator: Green battery=charged, red battery=charging Surge Protection: With 400 joules of protection, your devices are always safe Specifications: Input: 125V, 60Hz 0.5A max; Output B: 5V=2.1A; Output C: 5V=1A; Output Current: 4.2A max; Joule Rating: 400; Watts: 20W