GS-020 Instruction Manual SKYROCKET Think you're FAST? Prove itl SK.500023 GNUS PERFORMANCE ANALYZER GNUS Performance Analyzer (GSMO020) allows you to measure and analyze many aspects of your RC car & hydroplane's performance using the latest GNUS engine (GPS, ONASSIS) which gives you acceleration, Force, speed, distance and time. This device uses barometric pressure sensor to detect the height above the ground level.