Yesterday on a lark I picked up a Max Trax to play around with the altimeter it has. After a cursatory looking over it seems not abarometric type, so I guess it's a type like a bottom of the line G-Wiz, of which I know nothing of note about. Amongst other things I'm out to see if I can fly the thing higher than it wants to read. Does the altimeter have a practical limit? If so, what? Not surprising there was flat zero useful information packed in the instructions.