[Power saving]: The upgraded doorbell button is more beautiful and power saving than other doorbell switches; It's easy to find green [ material]: It is made of solid door cover, which is not easy to and deform. The interior is made of high-quality copper plate. This door opener must be to be used for a long time without needing to be replaced again [Widely used]: This kind of luminous doorbell button switch is universal, suitable for low- buzzer system, and is a good substitute for the garage door opener or doorbell switch [Easy to install]: This doorbell button is about 2.8 x 0.86 x 0.59 inches (L x W x H), equipped with 2 screws, and the screw hole spacing is 2.2 inches (note: wires are not included). If it is used as a substitute, it may not need to drill holes [Widely used]: This kind of luminous doorbell button switch is universal, suitable for low- buzzer system, and is a good substitute for the garage door opener or doorbell switch