Your portable power bank, the Revolt 4000 is USB-optimized for handheld electronics like phones, tablets, GPS, and UV water purifiers. Shock-proof and weatherproof, the Revolt 4000 is Adventure Armored for rugged reliability in even the most demanding outdoor situations. Overall Dimensions; 3″ x 3″ x 1″ with a light 5ounce weight. Output is 2.1 Amp with standard USB and includes a 3 in 1 cord. Features a Vibram Sole undercarriage that keeps the Revolt in place. Covered with our U Proof protection; Buy It. Try It. Bust It. Return It. No questions asked.