Fast & 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 & the staple magazine pops out from the front. Backed by a 100% Performance Guarantee. Optima 20Detachable staple remover, low-staple indicator light & adjustable depth guide (six AA batteries – sold separately). High Capacity Stapling: No; Flat Clinch Plate: No; Tacking: No; Type of Staple Used: Standard.