Size: 18cm x 17.5cm x 6.5cm. Power: Requires two AAA batteries. Sports & fitness: Get an ab muscle stimulator trainer. Modes: Choose from six different modes to suit your workout needs. Options: Choose just the ab stimulator, or buy with two arm stimulators. Workout: Designed to help you burn fat faster during your workout, as well as target specific muscles on your abs and arms. Ab Muscle Stimulator Trainer | Living Social