The FrSky Servo Channel Changer is a used for programming S.BUS & CCPM compatible servos. Simply connect to the servo and a battery and then use the roller switch to change and set the channel number for that servo. In addition to being compatable with S.Bus servos, it can be used to programme the FrSky S.BUS to PWM Decoder.
The Channel changer is required reset the default ID for the new Smartport sensors.