... digitronwork voltage:DC12V, consumption is below 3Wtemperature: 0°-70°volume: 140MM*102MM*30MMWeight: 300G Apearance attractiveDesinged to be waterproof ... without any operation.When redaing card or pressing key controller power on.Applied as a E-wallet, only record ... changing rate.Matched with a flowmeter, charge counts on volume, scientificly,fair, reasonableAdopted easily, upper-class software can ...