Plug in your Paragon System and make sure it is fully powered. The unit should default to DIRECT MODE. Simultaneously press RAPID PRECISE & GENTLE PRECISE buttons until the display shows "Unbi". This will unbind the old sensor from the Paragon System. Turn on the new Paragon Sensor by holding the power button for 3 seconds. The display will show "SYNC" when connected to the new Sensor. This procedure can be followed to unpair and pair any Paragon Sensor.