Its handheld size and battery power make it ideal for moving between conference rooms to tackle a range of stapling jobs. 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. Compact, ergonomic design ensures comfortable handheld stapling. Operates quietly without compromising power or speed. Easily switch between stapling modes with the user control switch. Features automatic and manual stapling modes for flexible operation. QuickLoad™ technology for easy staple reloading. Eject empty staple magazines with the press of a button. 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. 4 AA batteries required (not included). Not compatible with rechargeable batteries. Limited 7-year warranty.