... the users pay firstly, use second, This meter is best way to solve payment-collect problems, it has many functions such as ... automatically.♦Data-copying function makes the electricity department easily to manage. The data can be preserved for more than ... voltage(V)110,120,220,230,240,etc.Rated current(A)1.5(6), 2.5(10), 5(20), ... 10(40)A,15(60), 20(80), 30(100),etc.Rated frequency50Hz ...