Protrack II Altimeter

The PROTRACK ™ II acoustic altimeter is capable of measuring free fall and open sail speeds. It has been designed to best suit the following disciplines: Bigways, Formation Skydiving, Freeflying, Wingsuit Flying, Student, Tandem, AFF, and even disciplines with sailing such as Accuracy and CRW. Fully automatic.
Continuously records ambient air pressure, temperature and adjusts digital hardware to local elevation.
Micro USB for connecting to different types of applications.
4 warnings while boarding the plane, 4 warnings with open canopy and 4 warnings in free fall all in 4 different setups for a total of 48 customizable warnings.