Optima 20 Electric Punch is compact to save space and easily fit in your hand. Alignment indicators deliver precise three-hole punching. Transparent, hinged chip drawer shows you when it is time to empty. Oversized activation button allows quick, efficient operation. Electric punch offers portable operation with either an AC adapter (included) or six AA batteries. Automatic reverse feature releases jammed paper. Optima 20 punches up to 20 sheets of 20 lb. paper.