Description Feature 1POWER USAGE MONITORING: The wattmeter plug can easily measure power (watt), energy (kWh), volts, amps, Hz, power factor and maximum power (watt), time, days and calculate how much electricity it costs over an accumulated time period. 2DATA MEMORY FUNCTION: The power meter plug has a built-in 3.6V 40mAh rechargeable backup battery, it will record your electricity consumption data even if you unplug it from the socket; and you can continue to read the data after you plug it in again; this function is very useful for managing sudden power outages. 3OVERLOAD INDICATION: The electrical power consumption meter has an overload protection function, 3680W overload indication, which will notify you if the power consumption of a device exceeds the circuit's safe handling capacity. 4EASY TO USE: The electricity consumption monitor has 4 simple buttons that are easy to operate and can set various parameters. The LCD screen is easy to read from any angle. Ideal for monitoring the energy consumption of household appliances. 5APPLICABLE DEVICES: The energy meter plug is easy to calculate the power consumption of devices. Such as computers, game consoles, printers, TVs, routers, ovens, toasters, set-top boxes, fans, air conditioners, DVD players, HiFi systems, etc. Item Type: Electricity Consumption Monitor Material: PC Plug: GERMAN Plug 230V Battery: 1 x 40mAh NiMH Button Type Rechargeable Battery (Shipped with Built-in Battery) Wide Voltage Range: 150276V Voltage Accuracy: 2% Power Display Range: 0.09,999W Power Accuracy: 2% Display Total Power: 0.0009,999KWH Total Cost Display: 0.009,999 Electricity Cost Setting Range: 00.0099.99/KWH Package List 1 x Socket 1 x Instruction Manual