Descriptions: 100% brand new and high quality No Backlight Easily measure the power consumption and cost of your electrical appliances. Simply plug the meter into the wall and then plug your appliance into the meter. Measures various parameters: power (W), energy (kWh), volts, amps, hertz, power factor and maximum power (W), time, days - kWh is vital as this is what your electricity bills are based on! Large, clear LCD display for easy reading Cumulative Kilowatt-Hour Monitor Calculates electricity expenses Displays volts, amps and wattage accurate to 3% Low power consumption. Built-in Battery(3.6V rechargeable batteries ) backup - allows meter to be moved (and viewed) without losing readings.