You will first need to make the rotary dial is set to the "N" position.
  •  -Press the dedicated "Tone" button
  • -Press the lower stimulation button to Calibrate the compass
  • -Follow directions on display and rotate the Pro 550 + in a figure 8 motion
Once the compass has successfully calibrated you will see a check mark on the display verifying the calibrated.   Note- make sure to reposition the rotary dial away from the "N" position to enable training.