FrSky most receivers are designed to be used for the Gliders, FPV Racing, and Drone Flights. FrSky built the variometer sensor into the receiver, this will give you telemetry data like altitude and vertical speed. Some of FrSky Receiver supports the redundancy function as well, this means you can add on another receiver to create a back-up in case one fails. In addition, it supports SBUS and PWM mode, you can switch between these 2 channels easily. Find all Frsky RC receivers in this category. Enjoy Shopping for FrSky Transmitters Receiver!