9V Battery or AC operation (AC Adapter Included), an accurate digital scale for weighing cats, small animals, birds and reptiles. The scale has TARE function and a HOLD feature that will capture an unstable weight and keep it on the display for recording after the weight is taken. Capacity: 44lb x 0.02lb / 44lbs x .5 oz / 20Kg x 10g. 1.0" LCD display.