These monitors were put in a box when we moved into our present unit. They are new monitors, but are old stock and being sold at a heavily discounted price to clear. They clip over your existing interior mirror using strong spring loaded clips. We have only met one occasion where they would not fit a mirror. You need to allow 10.5 inches between your sun visors or they may snag it when they are down. The monitor uses a 7" colour LCD panel and comes complete with its power lead. To create a full system you need a 4 pin extension cable and a camera with the 4 pin aviation style connectors.