Open Up Power Twist Jar & Bottle Opener Safety pressure switch activates the motor as you hold the jar or bottle up within the cone Cone rotates safely, slowly but surely. Motorized twist action grips and lossens the top with 3 - 5 times the power of your hand Opens all sizes, 1/2" prescription bottle caps to large 4" vacuum-sealed lids; twist off, screw-off, depress-and-twist, mental or plastic Easily mounts under cabinet or shelf for single, safe operation Cordless Electric. Motors operates for more than a year with 4 "D" batteries (not included)