This was made from a Boo-Bah toy.  It really doesn't do a whole lot, hence the name, Boo-BLAH.  The Circuit board was re-housed in a can that a wrist watch came in.  Bends consist of a red push button trigger switch, pitch control pot, toggle switch for added distortion through a capacitor, 1/8" input jack for photocell control of pitch, and a 1/4" audio output.  Also has a small internal speaker for stand-alone operation.

A pretty annoying little bugger, just like the toy!
"Boooooooooooooooooooo-Baaaaaaaaaaaaaaaaaaaaaaaaa"
Picture
Boo-Bah original toy. (Stock photo)