... power cut, strong anti-disturbance capability, pretty appearance, etc.JM series electronic meter counter can be used in the industries ... Specifications ModelRange of countingFunctionOutput power supplyAppearance size(H×W×L)Size of mounting hole(H×W)JM72SJM48SJM20SJM80S0-999999and 0-9999.9selected ... 5VA Operating environment temperature 0-50°c, relative humidity≤85% JM Series Electronic Meter Counter