1.This products is suitable for usage of house,industry,Air condition,etc. 2.Time settiag range available from 0 to 99,999.99 Hours. 3.Accessories parts HM-C Adapter 72?2 for HM-1 HM-1 HM-2 TECHNICAL SPECIFICATIONS Item No. HM-1,HM-2(RAIL TYPE) Supply Voltage AC110V,220V/50Hz Dimensions 48?8?0mm Time Rrange 0～99,999.99Hours Net Weight 50g