Single Phase Energy Meter Din Rail Electricity Usage Monitor AC 40-300V 100A Voltmeter Ammeter Watt Kwh Frequency Power Meter 1.Accuracy: 12 words 2. Range: AC voltage: AC 40.0-300.0V or AC 250.0-450.0V (You should select one type of the meter in your order) The measuring range 40-300V without limitation, and it can be used in grid power, photovoltaic and inverter current 250-450V only can use for 380V AC Current:AC 0-100.0A, the current resolution is0.01A. Frequence: 45.0Hz 65.0Hz Power Factor: 0.00-1.00PF Electric Power: 0-450000W, the electric power resolution is 0.1W when measure electric power between 0-9999.9W, otherwise the electric power resolution is 1W. Electric Energy: 0-99999kwh, the display of electric energy resolution is 0.01kwh when measure electric engery between 0-999.99kwh, the display of electric energy resolution is 0.1kwh when measure electric engery between 1000.0-9999.9kwh and the display of electric energy resolution is 1kwh when measure electric engery larger than 9999.9kwh 3. Speed: 2 times per second Attention: The meter can only use for measure 45-65Hz AC city electricity. Note The measuring voltage range of this instrument is 200-450V and only applicable to the city power supply of pure AC 45-65Hz, and the measuring range is 40-300V. Please pay attention to purchase To measure 110V 220V voltage, please check AC40-300V, and measure 380V voltage to check 200-450V! If 200-450V is used to measure the voltage of 220V, the meter measurement is inaccurate, please pay attention! To measure the ABC three-phase voltage at the same time, AC40-300V must be used, and the premise equipment must have a neutral line, and three pieces need to be purchased! If you buy AC200-450V, only one of the three phases can be measured. _x000D_