This is the DX Delcatec WSC410C wireless HD security camera from one of Japan's three major manufacturers. I think you can feel secure with a top-tier domestic manufacturer's product, rather than buying a cheap, inferior product. This is the extension unit. The main unit is required. How about this for new installations or expansions? This is an expansion unit specifically for the WSC410S (monitor set). Therefore, it cannot be used on its own. You can search by model number to find out more, so please research before applying. According to the manufacturer's description, this is exclusively for the above model and cannot be used with other models from the same manufacturer. This is an unopened, unused item. When shipping, the product box will be wrapped in bubble wrap, and the shipping label will be attached directly to it, so please be aware of this simple packaging method. The shipping method is scheduled to be Yu-Yu Mercari delivery.