This small inverter requires only 2 AA batteries. It measures only 3.5 x 1.25 x .75 inches. Designed to fit in tight places it has enough power to make a tY30-125 tape visible. Easily lights up a tY30-63 tape. Will work with Cut&Shape sheets about A6 size (4x6 inches). Features a push button switch with four positions: Off, All On, Slow Flash, Fast Flash.