8va g-d-f !!! Great overtones as the chimes ring out  !  I am using it for a doorbell. Drilled a tiny hole in the striker and stuck a safety pin through it with a shoe lace attached to the mounted wooded chassis . I hated these electric battery operated  door bells that sound like an Atari alarm clock. Batteries erode all the time. The chimes come with a counter-sunk hanging spot just for a person who has instinct and vision to delight his guests with a musical calming chime.. Mounts with your choice of screws. (not included) 5 freakin' stars . Beautifully hand -made.