[Power saving]: The upgraded LED light doorbell button is more beautiful and power saving than other doorbell switches; It's easy to find green light in the dark [Widely used]: This kind of luminous doorbell button switch is almost universal, suitable for low-voltage buzzer system, and is a good substitute for the old garage door opener or doorbell switch [ material]: It is made of solid door bell cover, which is not easy to break and deform. The interior is made of high-quality copper plate. This wall mounted door opener must be to be used for a long time without needing to be replaced again [Easy to install]: This wall mounted 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 almost universal, suitable for low-voltage buzzer system, and is a good substitute for the old garage door opener or doorbell switch Colour:black Material:plastic Package Contents: 1 x doorbell Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Product Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 33 hours.