PS-625 RVSM Portable Digital Pitot-Static Tester • Most Affordable Digital Tester • More Convenience • More Functions • Less Maintenance The PS-625 Pitot-Static tester is designed specifically for the needs of general aviation. It is a low-maintenance, digital tester that is truly portable. An internal re-chargeable battery enables the test set to be used completely independent of any external power source for 3 hours. Check out these features!                 Altitude accuracy +/- 3 ft @ 0 ft, 9 ft @ 35,000 ft, 19 ft @ 50,000 ft, 25 ft @ 60,000 ft. Altitude goes up to 65,000 feet/18,288 meters Altitude is displayed in 1 foot/1 meter increments Altimeter section includes VSI - Vertical Speed Indicator Airspeed in 0.1 Knots, KPH, Mach and MPH to 650 Knots Display updates 5 times per second Leak Check feature in Altimeter and Airspeed modes Quick disconnect fittings Read pressure in inHg, mbar, mmHg, PSIA, and E.P.R. Independent Vacuum and Pressure pumps and systems Specifically designed and priced for RVSM use Lightweight - about 16 lbs/7 Kg Dimensions: 12"D x 15"W x 7"H Includes hose kit and external power supply Includes calibration Certificate valid for 1 year Limited 2-year warranty