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The number of hours, hours and time to clear the function, does not affect the next measurement. You can set each individual address, and use a display to view multiple measurement board measurement parameters. The use of multiple machines at the same time, you can set up a separate channel for each machine to avoid mutual interference. With a screen lock, timer off, brightness adjustment and change the language display and other functions. Its own power supply measurement range: 10V ~ 100V; External power supply measurement range: 0 ~ 100V; Current measurement range: 0 ~ 50A Power measurement range: 0 ~ 200KW; An hour measurement range: 0 ~ 2000KAH; Waters measuring range: 0 ~ 4000KWH; Time measurement range: 0 ~ 999 days; Address setting range: A01 ~ A99; Wireless channel setting range: A ~ Z; Accuracy: Voltage: 0.01V; Current: 0 ~ 50A - 0.01A; 0 ~ 100A / 200A / 300A - 0.1A; Power: 0.001W; Capacity: 0.001AH; Watts: 0.001WH; Time: 0.01H; Error: voltage 1%, current 2%; Sampling rate: 5 times / sec; Communication distance: open to a single group of 10 meters; Measuring board power consumption: 0.4W; Display board power consumption: 0.5W; Protection function setting range: NCP (negative overcurrent protection): 0 ~ -500A; OCP (forward overcurrent protection): 0 ~ -500A; OVP (overvoltage protection): 0 ~ 120V; LVP (undervoltage protection): 0 ~ 120V; Delay protection time: 0 ~ 10S; Package Include: 1 * Wireless DC Voltmeter 1 * Measuring Module Board 1 * 3m USB Expansion Cable