Directions: Normal Mode: Red digital tube on the left indicates real-time temperature, blue digital tube on the right indicates the set temperature. Setting Mode: Red digital tube on the left displays setting mode, blue digital tube on the right shows the settings contents. How to set start or stop temperature: Turn on the "SET" button and the screen blinks, press "up" and "down" button to set temperature. Setting Mode: Code Function Setting Range Default Start or Stop Temperature -55~120C/-67~248F 0C/68FP0 Working Mode H H/CP1 Differential Setting Value 0.2-30C 2CP2 High Temperature Alarm Value -55~120C/-67~248F 120C/24 8FP3 Low Alarm Value -5 5~120C/-67~248F -55C/-67FP4 Temperature Calibration Value -10.0C to 10.0C 0P5 Compressor Delay Time 0-60Min 0P6 Display Mode C/F Package List:1 * Temperature Controller 1 * Waterproof Sensor