SIMPLE AND : Simple and elegant surface push button is compact enough to blend seamlessly onto the facade of your home. BRASS RIM DESIGN: Durable plastic button framed by sleek brass 5/8 inch round cover offers a lovely and sophisticated appearance. EASY TO INSTALL: Push button is wired and may be used as a to a doorbell button with an already existing cover. Installing will only take a matter of minutes. WIDE COMPATIBILITY: Versatile enough that it will work with most models of transformers and wired chimes. IDEAL PLACEMENT: Door bell push button will work more ideally when used on stucco surfaces. PLEASE NOTE: A diode is needed (not ) if you are a digital chime (plays a melody; has a speaker for the sound). A diode is NOT needed if you are a mechanical doorbell chime (a 2-note sound; like a small mallet hitting a metal bar).