An ideal stapler for daily use, the Optima 20 Electric Stapler offers versatile stapling modes and user-friendly features. This dynamic stapler is Jam Free guaranteed for fast, high-volume stapling when used with Swingline S.F.® 4® Premium or Optima Premium Staples. Staples up to 20 sheets at once. Easily switch between stapling modes with the user control switch. Features automatic and manual stapling modes for flexible operation. QuickLoad™ technology makes reloading staples simple. Eject empty staple magazines with the press of a button. Low staple indicator light blinks to alert you when staples are running low. Built-in Intelligent Paper Alignment Guide and Stack Height Gauge assist in accurate staple placement and sheet count measuring. Operate using battery power or with the included AC adapter. 6 AA batteries required (not included). Not compatible with rechargeable batteries. Limited 7-year warranty and 100% performance guarantee.