How I loved this gadget!
Chrome exterior, a bit weighty in the hand, a very cool name, set screws for easy investigation on the under casing, and a definite, snap-CLICK action to each trigger.
This is analog because the "buttons" are actually spring-loaded triggers that strike one of four aluminum rods in the housing. Along the principles of tuning fork harmonics, the resonance and pitch were received by 1970's TV Zenith sets to engage one of four functions that are listed on the faceplate.
Well I remember my brothers and I taking this apart to drop the rods to the floor for random, analog-ous effect!