... and specious appearance etc. 1. Brief IntroductionDDS854 single phase electronic watt-our meter is intended for electric energy measurement and registration ... ), 10(60), 15(60), 20(80), 30(100) 110,120, 220, 230, 240 1.0S, 2.0S50, 60Starting currentOperating temperature range ... digital electricity meter is 18 months. DDS854 Single phase electronics watt hour meter