E-Bro Power Energy Saving Meter Watt Voltage Volt Meter Monitor Analyzer US Plug Large LCD display for easy reading. Measure voltage, frequency, current, power factor, wattage, minimum & maximum power and record cumulative kilowatt-hour, time and electricity expenses. Easily measure the power consumption and cost of your electrical appliances. Low power consumption,displays volts, amps and wattage accurate to 3% Overload warning displayed on LCD.