Fast and quiet, this electric stapler is Jam Free Guaranteed and not disruptive in any environment.Staples up to 20 sheets at once when used with Optima Premium Staples.Features a user control switch - choose automatic stapling or use the manual mode to activate the motor on your command.Easily refill with QuickLoad - just press a button and front loading staple magazine ejects.Stack Height Gauge helps you accurately measure sheet counts.Flexible plug-in or battery operated automatic stapling (includes AC adapter, batteries sold separately).100% Performance Guarantee.