Swingline Optima Grip Electric Stapler, Half Strip, Auto/Manual, 20 Sheets, SilverFast and quiet electric staplers you can rely on, keeping you productive without disturbing your co-workers. Staples up to 20 sheets, Jam Free Guaranteed, with Optima Premium Staples. Staple automatically or choose manual mode to activate the motor only when you want. Staplers operate on an included AC adapter or AA batteries (batteries sold separately). Stack Height Gauge helps ensure you don't exceed the maximum sheet count. QuickLoad feature simplifies staple refilling - just push a button and the staple magazine pops out from the front. Backed by a 100% Performance Guarantee. Automatic Grip mode, ergonomic shape, cushioned frame and Intelligent Paper Alignment Guide (four AA batteries - sold separately). Stapler Type: Electric; Staple Capacity: Half Strip (105 Staples); Size of Staple Used: 1/4"; Type of Staple Used: Optima.