The Digitude Pro model has all the same features as the standard model, except that the display format is 0 - 20,000ft in 10 ft increments. The 10ft digit is 1/2 the size of the other digits, so it is easily ignored in freefall. Under canopy however, its possible to check your altitude accurately all the way to the ground.
The Digitude electronic freefall altimeter is a totally solid state device, designed specifically for skydiving and other air sports. The altitude is displayed on a custom designed backlit digital LCD display, which is readable under all ambient light conditions.
The Metric Digitude is similar in features to the Pro model, but designed for jumpers who prefer the altitude to be displayed in meters. The display format is 0 - 6000 meters, with 10 meter resolution.
The high altitude model Digitude is similar in features to the standard model, but with a higher service ceiling. The display format is 0 to 30,000 feet, with a resolution of 100 feet. This model is designed for military and civilian use above the 20,000 ft altitude limit of the other Digitude models, and most analog altimeters. This model will actually display altitudes well above its 30,000 ft AGL rating, with a gradual decrease in accuracy as the altitude increases.