... in household. It adopts LSI(large scare integrated circuit), micro-electronics technique and SMT (surface mount technology) etc. Its performance comply ... ), 10(60), 15(60), 20(80), 30(100) 110,120, 220, 230, 240 1.0S, 2.0S50, 60Starting currentOperating temperature range ... DDS854 digital electricity meter is 18 months. DDS854 Single phase electronics watt hour meter