PACKAGE INCLUDES: You will receive a push button doorbell with light, perfect for low voltage ringing systems and an ideal replacement for most doorbell switches in your home CALCULATED SIZE: The door bell push is designed in a classic rectangular shape, measures 7.5*2.2*2cm/2.95*0.87*0.78 inches and comes with a pair of screws for mounting LUMINOUS DESIGN: This wireless doorbell for home features a built-in LED light that provides clear visibility even in low light conditions, making it easier for your guests to locate the doorbell RELIABLE MATERIAL: Our wired doorbell chime is made of thickened ABS plastic, which is not easy to age and break, and the interior is made of copper plate, which will not leak more safely APPLICATION: Doorbell buttons are compatible with a variety of wired doorbell transformers and ringers; when installing a new doorbell button, use the same wiring as the old doorbell button, Manufacturer: Ladongya