Note: . Be sure that the AC/DC switch on the back of the Musical Doorbell is in the AC position. For non-lighted pushbutton switches, remove the jumpers at the back of the unit.

That's it!
To test, press "Reset" then "Play"
In this type of installation, you may also install a 9V battery into the unit. This will allow you to take the unit off the wall for loading a user song. It will also provide battery backup for any user loaded song.