Delivers unobtrusive flexibility and quiet operation. Motorized mechanism provides extra-quiet, long-term performance. Powered by an AC adapter (included) or 4 AA alkaline batteries for go-anywhere versatility. Low battery indicator. Plastic and metal. 3/8" throat depth. Front loads a full strip (210) of 1/4" staples. Stapler Type: Electric; Staple Capacity: Full Strip (210 Staples); Size of Staple Used: 1/4 in; Type of Staple Used: Standard.