I've had one of these sitting in a junk drawer for years and decided to use it. Mine was salvaged off a non working trashed bike so i don't have any of the mounting stuff not even the magnet but the magnetic switch engaging you can hear it if you listen closely by passing a magnet near it. I think it's called a ''Halls sensor'' or hall effect sensor. Mine doesn't have a reset and is smaller silverish colored. I can mount it but im no good on these 2 button deals. Btw: That stock youtube misic is really bad
