Push and punch action designed for easy use and handheld operation if desired. Optional battery power for portable convenience. Batteries supply enough power to last through more than a year of average use. Auto-unjamming feature and reversing mechanism for trouble-free operation. Features an adjustable paper guide to get the holes just right. Also includes chip holder for easy disposal of waste. Operates on six AA batteries (sold separately) or AC adapter (included). Metal and plastic.