64-MELODY WIRELESS DOORBELL LIGHTS UP, fills your home with music when visitors arrive. Choose from 64 different tunes including “The William Tell Overture”, “Fur Elise”, “Westminster Chime”, and many more. Easy installation; no wiring needed! Includes one outside doorbell (uses one 12V battery, included) and one light-up indoor receiver (uses 3 AAA batteries, not incl.). Receiver is 3½" x 3"; doorbell is 3½" H.