Lee Electrical, BC208B, Polished Brass, Wired Classic 3 Gang Family Unlighted Black Push Buttons For Bells, specially designed for all chimes, bells, buzzers up to 24 Volts. This push button is easy to install, only a screw driver is required, attach one wire to each of the screw terminals on the back of button, and then mount in the desired location with the 3 screws that are provided. Push buttons are usually mounted near the door controls 35"-44" above the doorsill. Package includes 1 three-family unlighted push button, and 3 mounting screws.