[Energy Saving]: The upgraded LED light doorbell button is more beautiful and energy-saving than other doorbell switches; It is easy to find the green light in the dark [Widely Used]: The doorbell button switch type is almost universal, suitable for low-voltage bell system, and is a substitute for the old garage door opener or doorbell switch [Material]: It is made of a solid doorbell cover, which is not easy to break and deform. The interior is made of high-quality copper plate. This wall-mounted door opener should be able to be used for a long time without needing to be replaced again [Easy to Install]: The wall-mounted doorbell button measures 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 used as a substitute, it may not be necessary to drill holes [Widely Used]: Doorbell button switch type is almost universal, suitable for low voltage bell system and is a substitute for the old garage