The OEM Swingline Breeze Automatic Stapler SWI42132 is an electric stapler that can fasten up to 20 sheets at a time with its smooth, motor-driven mechanism. It is powered by four AA batteries (sold separately) and features a low-battery light to indicate when it's time to change batteries. The clear-view window allows you to see where the staple will go, while the push-button staple-loading design simplifies the process. With a 105-staple capacity and a 5/16" throat depth, this stapler uses S.F. 3 premium staples.