Processing Power: 5 GH/s (+/- 10% running variance) Included accessories: USB Cable and Power Cord Plug the USB cable into a host computer and run the supplied software. Additional Bitforce SC products can be added to the chain via a USB hub for linear performance multiplication with no overhead cost. Each additional unit is auto-configured and folded into the workforce without any user intervention required. Warranty: This unit’s system board has a lifetime warranty from manufacture defect or component failure. Order up to 4 - 5 GH/s bitcoin miners and pay the same standard, flat shipping price. http://bitbin.it/DAgKpvin