This listing is for an HP 7550A Graphics Plotter. It was pulled from a working environment, power tested, and powers on as it should. No further testing has been performed on this device. Installed in the back of the plotter is an HP 10833 module, but the cord is cut. There are signs of wear on the item from previous use. All photos are of the item you will receive. We do not provide tech support for this device. If you have any questions, feel free to contact me.