Zman Shabbas KeeperManufactured by GE Appliances, the Shabbos Keeper is the most advanced Shabbos keeping device of its kind. With the entire Jewish calendar built inside, it will automatically set your appliance to Shabbos mode each week and every Yom Tov, and also set it back to weekday mode after Shabbos. THE ONLY 100% SHABBOS SOLUTION Using an Enhanced Shabbos Mode (EHM) the Shabbos Keeper fully automates the compressor, auto defrost, lights, sensors, thermistors