Slide the rear cover off of the appliance and insert two AA batteries, paying attention to the polarity. Line up the "+" symbol with the post for each battery. Slide the rear cover on again.
Stand the can upright (rim facing upward) on a table or countertop. Place the One Touch opener on top of the can. Line up the edge of the rim with the small groove on the underside of the can opener.
Press and hold the "Start" button for about one second. Immediately release the button and remove your hand from the can opener.
Wait until the One Touch can opener makes a complete circle on the rim of the can. This should only take a few seconds. Lift the can opener away from the can. The can's lid is attached to the magnet beneath. Remove the lid from the magnet and discard it.