For Model Rocket and Airplane Owners...

"AltimeterOne" is the ONE altimeter that you'll use in every rocket you fly to find out how high it went. Why? The four main reasons are because it displays the altitude on an LCD screen, it is so easy to use, it doesn't require a payload bay like other altimeters, and it is small and lightweight. Enjoy 2 AltimeterOne altimeters.

Specifications:

Size: 0.47" x 0.64" x1.93"
        (12mm x 16.3mm x 49mm)
Weight: .24 Oz (6.7 grams)
Useful Range: Up to 29,500 feet (9,000 meters)