Wired Doorbell, Guest Welcome Energy-saving Door Bell, ABS Simple Generous Home Store Security Doorbell Button Designed to protect your home and to let you know when your guests arrive. It´s easy to use and install. Energy-saving design. The designed appearance is simple and generous.Here are the sizes: 53 mm * 53 mm * 28 mm/ 2.09 inch * 2.17 inch * 1.1 inch, 37 mm * 19 mm * 60 mm/ 1.46 inch * 0.75 inch * 2.36 inch. The color is white.Great for large homes, apartments, offices, warehouses., etc. Perfect for home, garage, apartment, dorm room, mobile home, RV, office and more.SpecificationsMaterial: ABS and electric component.Size: 53 mm * 53 mm * 28 mm/ 2.09 inch * 2.17 inch * 1.1 inch, 37 mm * 19 mm * 60 mm/ 1.46 inch * 0.75 inch * 2.36 inch.Battery: 2 AAA(not included).NotesPlease understand there may be mild deviation exist.Due to the lighting and monitors, there are slight difference between the picture and the real item.Package Content1 * wired electric doorbell.(2 * AAA Battery (not inluded)