The DFT-880 uses a powerful microprocessor to accurately monitor and control all functions of the de-ice process. Further the DFT-880 indicates the current status via 2 clearly marked LEDS. This advanced control logic helps ensure the de-ice process is accurately controlled to ensure best HVAC equipment performance. To offer the most value for your investment the DFT-880 operational parameters can be easily fine tuned to suite the demands of the particular reverse cycle unit the DFT-880 is servicing. Simply by changing some DIP switch settings the de-ice initiation temperature, the de-ice termination temperature as well as the de-ice inhibit time.