MULTIPLE MEASUREMENT FUNCTIONS: This power energy meter can measure and display voltage, current, energy, frequency, power factor, maximum current & power, time days cost and total kWh. Energy monitor plug with 7 modes for your choice. NOTE: The "day" and "time" are only counted for device with power larger than 2 watt. (Will not count time when device in standby mode). OVERLOAD ALARM FUNCTION: The power energy consumption monitor will alarm automatically to warn the user when exceeding the rated power 3680W. The power plug will simultaneously cut off to prevent from damaging. A reliable electricity usage monitor uk power consumption meter for home use. BETTER VISUAL EXPERIENCE: UPDATED VERSION AC Watt meter with large and clear LCD display, 180 viewing without dead angle, with backlight function, it is clearly visible whatever day or night. The blue backlight will be off automatically after 10 minutes without operation. Press any button to wake up the backlight. Backlight time: 10 minutes. AUTOMATIC DATA STORAGE FUNCTION: The last data is stored automatically when the power supply abruptly lose. Don't worry about data loss due to a sudden power outage. Great energy monitors for home, electricity monitor, home energy monitor, electric meter and amp monitor. Press "FUNCTION" and "UP" at the same time to clear cumulative data without removing your settings(e.g. price, etc.). WHAT YOU GET: UK Plug Power Meter for monitoring all your home applications, helping you lower power consumption and save money. 2-year Warranty on our power monitors. Please contact us for any concern or issue. Product Description Read more The consumption and time will NOT be measured and counted when: your device is in standby or not working; the rated power of your device is smaller than 2 watt. WHEN POWER SWITCHED OFF AND BACK ON, IF THE POWER METER TURNS "0", IT MAY BECAUSE THE TESTING TIME IS LESS THAN 1 HOUR, OR TOTAL KWH LESS THAN 0.1 KWH. THAT'S WHY NO DATA SAVED. What data can be saved? Electricity quantity, cost, unit p rice, cumulative time. (But NOT save current, voltage, power, power factors) You can switch to Mode 7 by pressing the button COST to quickly set the electricity p rice(GBP per kWh) How to clear cumulative data without removing the settings? Press " FUNCTION " and " UP " at the same time to clear cumulative data without removing your previous settings. Press any button to wake up the backlight after it automatically turn off (Backlight time: 10 minutes) Press RESET will clear all data including your previous settings. Note: Please use a ballpoint pen to press the RESET button , using a pin may make the button stuck into the device.