Brunton Solar Controller Brunton Product Includes battery charger Great for camping Battery charge monitor designed to keep your solar panels from overcharging 12-volt batteries Maintains your 12-volt battery in fully charged state without causing acid overflow Overall dimensions: 3.8x2.7x1" Weight: 4.2 oz. Measures 2.7 x 3.8 x 1 inches (W x H x D) and weighs 4.2 ounces; 1-year warranty