The Swingline A7074515 electric portable desktop 3 hole punch is designed for effortless hole punching. It is dual-powered, so you can use it with the included AC Adapter or 6 AA batteries (sold separately) for portable operation. The compact, sleek size fits in any workspace, so it is an excellent choice for the home office. The reset button reverses the punch pins to clear jams to help speed up hole punching project. A hinged chip door offers easy maintenance without the mess. It can punch up to 15 sheets of 20 pound paper at a time with ease. The Swingline A7074515 is a quality product you can depend on that is backed by a manufacturer's limited 1 year warranty. Swingline, a leading brand in workspace tools for the business, home and mobile office for over 80 years continues to introduce new staplers, sharpeners, punches and trimmers that solve common workplace frustrations and increase productivity. With unmatched quality, durability and performance, Swingline products are truly designed for the way you work!