15-Sheet Duo Electric/Battery PunchSized to fit compactly on your desktop. Battery-powered option offers portable convenience and a 3,000-punch battery life. Auto-unjamming/reverse feature makes use a breeze. No adjustments to switch between two or three holes. Adjustable paper guide. Chip holder. Operates on six AA batteries (sold separately) or AC adapter (included). Sheet Capacity: 15; Operating Method: Electric/Battery-Operated; Number of Holes: 2-3.