Features: AC voltage: AC 40.0-300.0V or AC 200.0-450.0V (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 is 0.01A . 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. Specifications: Material:ABS Size:Approx.54x80x64mm/2.13x3.15x2.52in Type:AC40.0-300.0A(internal),AC 250.0-450.0(internal),AC40.0-300.09(external),AC 250.0-450.0(external) Net Weight:95g Package Includes: 1x AC Monitor note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.