This 13A Plug in Power Meter provides the following readouts:
Voltage (Volts) Frequency (Hertz) Current (Amps) Power Factor (Percentage) Power (Watts) Max Power since supply switched on (Watts) Kilo Watt Hours (kWH) Time Elapsed since supply switched on (Hours, Minutes, Seconds) Cost of electricity used (Pounds and Pence) with user settable cost per unit