TS-836A Plug Power Meter Energy Watt Voltage Amps Meter with Electricity Usage Monitor, Reduce Your Energy Costs Reviewhttp://is.gd/RGVnOG TS-836A Plug Power Meter Energy Watt Voltage Amps Meter with Electricity Usage Monitor, Reduce Your Energy Costs 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 readingElectricity price setting by pressing COST, FUNCTION, UP and DOWN button according to the instructionsBuilt-in Battery(3.6VLow power consumption rechargeable batteries ) backup - allows meter to be moved (and viewed) without losing readingsDisplays volts, amps and wattage accurate to 3%