7 Monitoring Modes: This electricity usage monitor supports multi parameters monitoring, including time, wattage, cost, cumulative power consumption, voltage, frequency, current, power factor, minimum power, maximum power, electricity price. Our electricity usage monitor are also specially designed with a blue backlit LCD screen to easily read and record data even at night. Electricity Usage Monitor: Just plug your electrical appliances into this power meter, it starts monitoring and recording the real-time power consumption, current and electricity cost of your electrical appliance, help you save energy and money. Power meter works well with any home appliances, such as air conditioner, water heater, rice cooker, water dispenser, electric heater, cell phone, etc. Overload Warning: When detected the current load of connected device beyond 3680W, the LCD screen will keep blinking OVERLOAD to remind the user, protect device from damage. The power plug will simultaneously cut off to prevent from damaging. Memory Function: With built in backup battery, the last data is stored automatically when the power supply abruptly lose. Dont worry about data loss due to a sudden power outage. Electricity usage monitor have large LCD screen, easy to read even at a long distant. Easy to Use: Just press the FUNCTION button to choose the monitoring mode. Press the COST button to set the unit electricity price from 00.00 COST or KWh-99.99 COST or KWh. the UP and DOWN button to adjust the price. RESET button to clear all settings. Specifications: Material: ABS Package Size:16x13.6x8.6cm Size: 82x76x165mm Operating current: max 16A Working Voltage:230V-250V Current Display Range: 0.000A - 16.000A Timing Display Range: 0 second-9999 days Wattage Display(watts): 0W-9999W Voltage Display Range: 0V-9999V Frequency Display: 0Hz-9999Hz Price display range: 0.00 or KWh- -99.99 or KWh Total kWh and cost display: 0.000 kWh- -9999 kWh, 0.00- -9999Battery: built-in a 3.6V 20mAh rechargeable NI-MI battery(included) 7 Display Modes: Mode 1: Time or Watt or Cost Mode 2: Time or Cumulative Electrical Quantity Mode 3: Time or Voltage or Frequency Mode 4: Time or Current or Power Factor Mode 5: Time or Minimum Power Mode 6: Time or Maximal Power Mode 7: Time or Price