One Touch Automatic Can Opener Leaves a Safe, Smooth Edge! Just place it on the can and press a button - no tedious hand cranking required! Automatic operation is ideal for the elderly, arthritis sufferers, kids and folks with limited dexterity. Opens cans of all sizes in just seconds. Cuts under the lid, not through the top, so the sides of the lid are smooth and safe. Built-in magnet holds can lids securely. Ergonomic design. Operates on 2 'AA' batteries (not included).