Lee Electrical, BC203C, Chrome, Wired Classic Two 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 4 screws that are provided. Push buttons are usually mounted near the door controls 35"-44" above the doorsill. Package includes 1 two-family unlighted push button, and 4 mounting screws.