[Power saving]: The upgraded LED light doorbell button is more energy efficient and visually appealing than standard doorbell switches; the green illumination is easy to locate in the dark [Widely used]: This luminous doorbell button switch is compatible with most low-voltage buzzer systems and serves as a suitable replacement for older garage door openers or doorbell switches [Material]: Constructed with a durable doorbell cover that resists breakage and deformation; interior features high-quality copper contacts. This wall-mounted door opener is designed for long-term use without frequent replacements [Easy to install]: This wall-mounted doorbell button measures approximately 2.8 x 0.86 x 0.59 inches (L x W x H) and includes 2 screws with a screw hole spacing of 2.2 inches (note: wires are not included). When replacing an existing unit, drilling may not be required Color: 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 slight variations in color between the item and the image. Measurement may vary by +/- 1-3cm