This Musical Doorbell replaces your current chime and gives you the choice of sounds to announce your visitors. Choose from the pre-programmed selections, or program in your own tune using the keyboard. Includes chimes, old favorites, patriotic, spiritual, holiday, classical, children's, halloween, animal sounds, and voice phrases. A songbook of more tunes is included to help get you started in programming your own songs. The Musical Doorbell is powered by one 9 volt battery, not included.Announce your visitors in style, to custom music you create yourself, or choose from well over 100 built-in songs, sound effects, and even voice phrases. This electronic door chime is designed to replace the normal wired mechanical door bell in your home. It supports a front door button (both lighted and non-lighted) as well as a back door button (optional). It can be set up to play any particular song or sound, or for more variety, it can sequence through any one of twelve groups such as Holiday, Halloween, Patriotic, Spiritual, Old Favorites, Animal Sounds, Children's, Classical, and more. But the real versatility of this doorbell comes with its unique programmable feature. Using the built in piano-like keyboard, you can easily program in your own song! It even comes with an instruction manual containing the notes for many more popular tunes. A song can be programmed note by note or it can simply be played like a piano and the doorbell will record and playback your composition. Program songs for family events such as birthdays or anniversaries. Have it play your school fight song. Switch it to Holiday songs for your guests at your Christmas party. Have it scream or howl for Halloween. The possibilities are endless. This product is limited only by your own imagination.