Thanks for the responses guys, very helpful. Ben, I bought a storage unit for the furniture that was in the unit and this equipment just happened to come with it. Rather than getting rid of them I figured I'd try and learn a little bit about them. Fabrizio, the last item has a dc plug and plugs right into the wall and you flip the switch to turn it on. When it's running the dials/levers on the front spin so I'm not sure what that could be for?