It doesn't act like a doorbell for someone outside, just welcomes your guests with a pleasant strum when they come in, cost $150. http://technabob.com/blog/2014/04/25/the-guitar-doorbell/
Awww...I'd be visiting you all the time to see that cutie, LOL!
What surprised me was.
An American used a non electric screw drivernthego:
Well, How do you feel about power steering, electric refrigerators, washing machines, toasters lamps etc.?