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* With the free GNSS PA App, drivers can track and monitor driving racing speed and remotely from the Android or IOS device. The built-in BT 4.0 module makes reading data on the fiy in the field. This performance analyzer definitely turns the dull data into helpful analytics to fine-tune for RC hobbyists. * With tailored three modes for RC hobbyists. Drag, Track, and Flying, RC run or fight can be analyzed easily and visually. The GNSS PA App software automatically charts slope as time elapses. Saved runs can be read by the App, allowing analyzing of average speed, maximum speed, and acceleration within the given time and defined distance. The meter can also be used as a speedometer and provides accurate logging of speed data. * The GNSS Performance Analyzer supports GNSS(Global Navigation Satellite System) with GPS and GLONASS system that means more satellites are orbiting the earth. The advantage of this many satellites will definitely improve positional accuracy by tracking two satellite constellations instead of just GPS. * The 5 hours' up-time on the built-in rechargeable LiPo battery can give enough racing time to RC drivers or pilots in the field! With the micro USB charging port, it is very convenient to connect it to a USB port or another compatible USB power source for charging. With Visual LED indicator, Data Share, Built-in 1M Memory and Support both Metric and Imperial system of Measurement function. * GNSS Performance Analyzer allows you to measure and analyze many aspects of your RC car & airplane's performance using the latest GNSS engine (GPS, GLONASS) which gives you Acceleration, G-force, Speed, Time, Distance, High and Vertical Velocity. With its compact size of 40mm x 39mm x 16mm and internal antenna, it is an ideal choice for mounting on RC vehicles & airplanes.