This multifunctional meter can measure AC voltage, AC current, active power, power factor, frequency and electric energy. The results will be displayed on a color LCD screen. Features: Multi-function digital meter can measure and display 6 parameters, including AC voltage, AC current, power, frequency, electric energy and power factor at the same time. With power-down memory function: When the meter is powered off during use, the meters accumulated power value will be stored automatically (the previous data will not be lost). Equipped with a LCD HD display, which is clear and easy to read. There's a reset button on the right side of the display which can reset the accumulated values to zero if pressed and held for 5 seconds. One digital meter to monitor household power consumption in real time. Specifications: Material: ABS Color: Black Measurement Range: AC voltage: AC 40.0-300.0V / AC 200.0-450.0V (Optional) AC current: AC 0-99.99A, Minimum resolution is 0.01A Power: 0-30000W(AC 40.0-300.0V); 0-45000W(AC 200.0-450.0V) 0-9999.9W minimum display resolution is 0.1W, otherwise Minimum resolution is 1W. Electric energy: 0-9 999 999kwh. 0-9999.999kwh minimum resolution is 0.001kwh ; 10000,00-99999.99kwh minimum resolution is 0.01kwh ; 100000.0-999999.9kwh minimum resolution is 0.1kwh; Otherwise minimum resolution is 1kwh Accuracy: 1%2 words Measuring speed: 2 times per second 100A current transformer hole diameter 15.5mm Working temperature: -10+50 Working humidity: 1080% (no condensation) Working pressure: 80106kPa Item Size: 70 * 40 * 39mm / 2.75 * 1.57 * 1.53in Item Weight: 83g / 2.92oz Package Weight: 90g / 3.17oz Package Size: 9*4.5*4.5cm / 3.54 * 1.77 * 1.77in Packing List: 1 * Multi-Function Digital Meter 1 * Toroid current sensor 1 * User Manual (English)