ITEM NAME:100A LCD Digital Volt Watt Current Power Meter Panel Ammeter Voltmeter +Shunt Product Description Description: Function: Electrical parameter measurement function (voltage, current, active power, energy) Voltage alarm function (over voltage alarm threshold, backlight and voltage flashing to alarm). The reset function of energy key. Store data when power off. Large-screen LCD (display voltage, current, active power, energy at the same time) Backlight function. Specifications: Voltage Measuring Range: DC 6.5 ~ 100V Current Measuring Range: DC 0 ~ 100A(Max. Power 10kW) KWH Measuring Range: 0 ~ 9999kWh KWH measurement is nonvolatile with power interruption. It can be reset to zero via reset button. Operating Temperature: -10 ℃ ~65 ℃ Operating Humidity: 10~85% RH You can turn on/off the blue back light manually. Included: 1 x LCD Panel DC Power Meter 1 x Shunt.(Power 10kW). The reset function of energy key. It can be reset to zero via reset button. If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item.