This option provides convenient in-house printing by stapling the booklet by yourself. It also offers dual position job offset and high capacity stacking to address high volume network printing demands. Smart sensing indicates when the staple supply is low as well as when staples run out. The output bin supports up to 500 sheets of unstapled paper. The Staple Finisher canstaple a maximum of 50 sheets per set in A4, Letter, Legal and Folio sizes. Staple cartridges contain 5000 staples. Refill staple cartridges are available in packages of 3 cartridges. This product has been tested and validated on Dell systems to ensure it will work with your computer. Dell provides technical support for this product, when used in combination with a Dell system.