The Cameleon Telescan Mark-2 "USA" model is a version of Telescan Mark-2 mainly differs from "standard" model with a mirror turret system by the control boards are mounted directly on the top of the turret. The electronic connection between the head and the rest of the projector is no longer cable but by an electronic board that runs throughout the head tube.
Practically, the resolution and the speed of the mirror is greater than the "standard" version.