Simply enhance your homes entryway with this wired doorbell push button. Finished in an antique brass and featuring a solid metal plate, this push button works with most 16-Volt hardwired doorbell systems and mounts to your homes door frame or exterior wall. This push button requires a transformer if not already installed, and this unit is compatible with any wired doorbell brand. It also features a lighted insert so your visitors can easily view the button at night. How To Replace A Doorbell Antique brass finish Solid metal plate LED lighted insert makes it easy for your visitors to see the push button at night Recess mount Color-matched mounting screws included Total length: 3.40 in. Distance between screw holes: 2.12 in.