Detailed Product Description HOUR METERTECHNICAL SPECIFICATIONSItem No. HM-1,HM-2(RAIL TYPE)Supply Voltage:AC 110V 220V/50HZ, 60HZDimensions: 48*48*40mmTime Range: 0-99,999,99hoursNet weight: 50g1. This products is suitable forusage of House,Industry Air condition,etc.2. Time setting range availablefrom 0-99,999,99hours.3. Accessories parts HM-C; Adapter72*72 for HM-1.