Swingline Electric 3 Hole Punch, Desktop Hole Puncher, Portable, 15 Sheet Punch Capacity, Silver/Black (74515) POWERED EFFICIENCY  Light, compact electric punch provides quick, precise punching. Automatic 3-hole punch with efficient paper alignment indicators ensures accurate punching every time. JAM RESISTANT - Automatic jam reverse switch ensures trouble-free punching and fewer disruptions, even through the biggest punching projects. PUSH BUTTON START  Simple push-button start makes hole punching effortless. Efficient electric punch allows you to preserve your strength while still presenting professional results. 15-SHEET CAPACITY - Punches through as many as 15 sheets of paper, creating precise 9/32" holes with the push of a button. AC OR BATTERY  Dual power options. This punch can be powered by an AC adapter or 6 AA batteries, providing both reliable punching power and lightweight mobility in one convenient package. LESS MESS  Chip tray minimizes mess and allows for easy cleanup of punched holes  just empty it when you notice its getting full. BUILT TO LAST  Swingline stands behind this high-quality automatic punch with a Limited 1-Year Warranty.