If you're tired of the old ding dong that's associated with the average doorbell and you don't want to invest in a little jingle that will drive you insane after four plays, then you should look into the guitar doorbell. The guitar doorbell is a half sized acoustic guitar that you attach above your doorway to serenade visitors as they walk into your home.
The genius behind this device is Dave Lynch, who owns the Guitar workshop in Sacramento. While the obvious draw to the device is that you have a cool guitar sitting above your door that will wow people as they enter, you also get a fully functioning guitar that can be taken down and used.
If you're ever not expecting visitors you can even have a little jam session with your doorbell.