DCI Mobile Power Bank Universal External Battery Charger for iPhone 4/4S/5 and Samsung Devices - Retail Packaging - Color May Vary, Green/Black/Blue/White Universal on the go external battery charger Offers approximately 3 hours of charging time when fully charged Compatible with iPhone 4, 4s, 5 and Samsung devices Assorted green, black, bue or white color, color chosen based on availability Measures 1 by 3.9 by 1-inch