ETC ELECTRONIC TEMPERATURE CONTROL;ETC used in many commercial refrigeration applications;Wide temperature range, one and two stage capability;Selectable heating/cooling modes and multi-voltage input;ETC is designed to provide application flexibility;Models available include 120/208/240 VAC,;as well as single stage and two stage.;Wide temperature range (-30°F to 220°F);Wide different adjustment (1°F to 30°F);ETC-111000-000 120/208/240 VAC STAGE One # 46-1427;ETC-112000-000 24 VAC STAGE One # 46-1428;ETC-141000-000 120/208/240 VAC STAGE One #46-1430*(NEMA 4);ETC-211000-000 120/208/240 VAC STAGE Two # 46-1579;ETC-212000-000 24 VAC STAGE Two 46-1422;Walk-in and reach-in refrigerators, Milk coolers, Displays.