FrSky Xact HV5401 STD HV 8.4V Servo (EOL - Replace S5451H)The Xact series coreless servos utilize all CNC machined aluminium protective case and metal gears, these servos are 8. 4V high voltage capable and offer high speed and configurable torque performance. Also, the Xact series servos offer multiple form factors and configurations to fit for different model types and precision usage. Working with the F. Port 2. 0 protocol, the telemetry data (like real time current and voltage) of Xact servos can be