DURABLE AUTOMATIC STAPLER – Automatic stapler combines the durability of sturdy, plastic construction with the convenience of a small footprint, helping you conserve workspace. BATTERY POWERED – Battery-operated stapler delivers the high-powered performance of any traditional electric stapler. Fast, motor-driven stapling, powered by 4 AA batteries (sold separately). SECURES 20 SHEETS – This sturdy little stapler securely fastens up to 20 sheets. Designed to work best with Swingline S.F. 4 Staples. Low staple indicator alerts you when it's time to refill.