I have the FrSky Xact Brushless Servo BLS5402H.
I use it with my TANDEM X20S transmitter in combination with FrSky RB30 and 2 ARCHER RS receivers.
That‘s really high-end servo technology!
Perfect servo design, fast speed with high torque performance!
This servo supports telemetry feedback, current, voltage, and temperature via FBUS mode.