Safety and environmental protection materials: This product is made of high-quality flame retardant ABS materials, which are safe and reliable to use. Measurement of various parameters: power ( w), energy (kWh), voltage (v), amps, power factor, cost, minimum and maximum power, accuracy and completeness. Save electricity and money Simple and easy to use: just plug the meter into the wall and the equipment into the meter to save labor and energy Overload protection function: when the total power exceeds the rated power of the monitor, the LCD screen displays "overload" and accompanied by an arrow sound to warn the user . He will use it. Digital LCD Display: High definition display, easy to read and record. Power display range: 0.1w~3680w; Voltage display range: 0.0v~9999v; Show total kWh: 0000kwh~999kwh; Show total cost: 0.00~9999. Size: 12*7*8cm