Usage Tips:1. Accuracy: 1%2 words 2. Range: 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 , 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 Factor: 0.00-1.00PF Electric : 0-450000W, the electric resolution is 0.1W when measure electric between 0-9999.9W, otherwise the electric 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. Style: AC40-300V size:54x80x64mm Material:Plastic + Metal colour:Grey Package Contents: 3 * Meter Built-in Current transformer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.