Using Enhanced Shabbos Model (EHM) the Shabbos Keeper fully automates the compressor, auto-defrost, lights, sensors, thermistors and more. Once set, it is programmed to automatically enter Enhanced Shabbos Mode 90 minutes before sunset Friday evening (to account for early Shabbos) and then revert back to weekday mode 90 minutes after sunset on Saturday night Interior lights stay on at reduced brightness during Shabbos Keeper Sabbath Mode. Shabbos Keeper will store information during a power failure for up to 72 hours, ensuring the proper mode is activated when the power comes back on. The Shabbos Keeper is simple to set up on more than 150 GE Appliances French-Door Bottom Freezer, Full-Door Bottom Freezer, and Side by Side refrigerator models.