FrSky VARI ADV Variometer Telemetry SensorFrSky VARI ADV High Precision Variometer Telemetry Sensor Look, we know you think you have the eyes of a hawk and the instincts of a migratory bird, but lets be real: youre standing in a muddy field in the UK squinting at a dot in the sky. The FrSky VARI ADV Variometer is here to tell you exactly how high that dot is before you accidentally breach CAA altitude limits or lose it in a cloud. Updated for the modern era with FBUS support (because S. Port