Features: Heavy duty protector for refrigerators and air conditioners up to 36 KBtu, as well for single phase compressors and motors Minimal and maximal voltage and adjustable time delay Designed under international quality certifications Work: 208/220V, 50/60Hz, Current 30A Time delay: 1.5 to 5 min. Under and Over Voltage: 220V to 260V / 170V to 210V Adjustable