Keep your cool with this automatic stapler?just insert paper and it staples for you! Smooth, motor-driven mechanism. Powered by 4AA batteries (sold separately). Features clear-view window and push-button staple loading. Includes low-battery light. Stapler Type: Electric; Staple Capacity: Full Strip (210 Staples); Size of Staple Used: 1/4 in; Type of Staple Used: Standard.