I used this altimeter for 2 years and went through 5 batteries (only 125 jumps on it). When it was working properly i loved it because of its easily readible face both in freefall and under canopy and its accurate altitudes. Heres the big BUT. A few times in freefall i have glanced at it and instead of seeing an altitude i saw, "Please press any key to continue" The battery was brand new and it was working properly in the plane and at the beginning of freefall, but then nothing. I recommend this for the weekend jumper, but if your someone who puts many jumps on them every day i would recommend choosing another altimeter.
Altimaster Neptune
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in Altimeters