Description: Basic functions: clock/voltage/current/power factor/operate time/power consumption display, price setting, etc. Plug and play type, no need any installation, easy for operation. Large LCD display with green backlight, easy to read in the dark. Overload alarm function: buzzer sounds when the appliance exceeds the setting alarm value. Power consumption history: record the energy consumption of a connected device for 7days/7months. 4 kinds of currency switchable: $, , and paper money. 2 tariff settings: electricity price per kwh and price for night-time current. Greenhouse gas emission(GHG): display the equivalent CO2 emission in kg. High accuracy measurement for 1%. Resetting for abnormal display. This power meter is a monitoring and testing instrument which displays the power consumption of a connected appliance and the cost of the electricity consumed. Values can be display as Voltage, Current, Power Input, Frequency, Power Factor, etc. You can also enter your electricity tariff and view actual costs. Additionally, the measuring device shows the total consumption of the past 7 days/7 months as well as the operation time. Display the equivalent CO2 emission in kg and also provide you with additional ecological information. It would become your best assistance to save energy and cost in daily life! Specification: Color: White Size: Approx. 65x146x80mm / 2.56x5.75x3.15inch Material: ABS + PC + Metal Plug Type: EU Max. Ratings: 230VAC / 16A / 50Hz / 3680W Indication of Frequency: 46~65Hz Resolution: 0.001W/0.001A Consumption Measurement: 0-999,999kwh CO2 Emission: 0-999,999kg Display Time: up to 9,999:59 hhhh:mm History Record: 7days/7months Operating Temperature: 10C to 40C Display: 50 * 40mm LCD with Green Backlight Battery: 2 * 1.5V LR44/AG13 Button Batteries Package Includes: 1 Piece of Power Energy Meter