Fast 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.