Punches in a standard two-hole pattern (2 3/4" centers) quickly and quietly. Optional battery power for portable convenience. Has convenient handle for carrying. Includes reverse motor mechanism to clear jams. Adjustable paper guide for accurate punching. Automatic on/off. Chip holder. Operates on six AA batteries (sold separately) or AC adapter (included). Sheet Capacity: 10; Operating Method: Electric; Number of Holes: 2; Hole Diameter: 1/4 in. Includes one punch and AC adapter.