First hands-free box opener. Make sure that the blade of the device is properly engaged on the box for problem-free use. Round, square, oval, flat or tall, large or small, the can opener cuts the lid alone! you have to press the button to start and press again to stop it. The boxes are opened and the lid is cut and lifted using a magnet located under the device. Warning: read the instructions carefully before using it A small household appliance accessory useful for the whole family, and essential for people suffering from osteoarthritis, carpal tunnel syndrome or grip problems. Works with 2 LR6 super alkaline batteries (not included) It adapts to all sizes, small, medium, giant... and all shapes of boxes, square, oval, oblong, rectangular, round. Equipped with technology that allows the lid to be lifted without touching it, and leaves absolutely unsharp edges 19.8 x 10.2 x 7.8 cm; 420 grams