... , 120x120mm 1.Generalvoltmeter is a kind of programmable electrical digital meter. It can measure AC network voltage accurately. With 4 keys ... on the front panel, we can set the parameters, such as PT ratio, parameters ... contact; 1A/30VDC,5A/250VAC (to control other equipments)4.Panel Size: 48x48mm; 48x96mm, 72x72mm; 80x80mm, 96x96mm,120x120mm