The Evolution Inversion is a hand mounted altimeter. It Measures 2 1/2 inches at the bottom and tapers to 2 inches at the top and weighs 4.3 oz. This altimeter comes standard with a 1 1/2 inch wide double overlapping wristband.
It also has free fly friendly warning zones, and a counterbalanced movement. The Inversion altimeter, the first mechanical altimeter designed for free flying, features a counter balanced movement. the counter balancing movement components eliminates any theoretical gravitational influence that may affect the reading consistency when inverted.