Wirelessly connect the monitor unit and wireless door phone. No wiring is required, making replacement easy. The door phone uses a wide-angle lens, and the monitor unit features a 3.5-inch LCD screen, allowing you to thoroughly check the area around the entrance. You can also answer visitors from your smartphone even when you're away from home. (Requires registration with a separately sold home unit) Monitor unit external dimensions: Height: 123mm x Width: 80mm x Depth: 24.5mm Outdoor camera external dimensions (height x width x depth): Height 75mm x Width 75mm x Depth 173mm Weight: Approximately 395g * This is a real unit sample for in-store display. It can be used exactly the same as the product sold. * Please understand that a warranty card is not included.