Hash speed: 50 GH/s (+/- 10% running variance) 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. Weight: 3 lb. 7.5 oz Dimensions: 9.75″ x 5″ x 5″ high Warranty: LIFETIME warranty from manufacturer (Buttefly Labs in USA) What you will get: 1 x 50 GH/s Butterfly Labs Single Miner 1 x Butterfly Labs Power Supply 1 x Power Cord 1 x USB Cable