Sleek, personal 3-hole punch is ideal for travel and features seamless automatic operation. Effortless, electric hole punching is achieved using the AC adapter included or 6 AA batteries not included. Delivers clean 3-hole punching through as many as 15 sheets at once. Easily clear jams by hitting reset button. Sheet Capacity: 15 Operating Method: Electric Number of Holes: 3 Hole Diameter: 9/32".