Lo Instructions for wireless plug-in door chime (Product #5137381) Open the cover of the push button with a flat screwdriver, A gene twisting will remove the cover of the push button. Insert the supplied 1 X A23 batteries in the push button, observe polarity, negative end is resting on the spring. Locate a good position for the push button next to the door. Do not mount on or next to a metal surface. Drill two 4.76mm holes and insert the wall plugs.