Features: brand new and high quality There are 4 types, built in 40-300V, built in 250-450V, built out 40-300V and built out 250-450V. Can synchronously read measured AC volt, amp, power factor, power, energy and accumulation for time. Can be used in the chemical industry, power plants, automation equipment, DOS systems, electromechanical equipment and others. Can run in harsh environment, for example, ice and fire. Standard guide rail can be combined with circuit breaker and installed in the distribution box. Specifications: Material: ABS Size: 80X64X5 mm/ 3.14X2.51X2.12 in The measurement range is 40-300V unlimited and can be used for grid power supply, photovoltaic and inverter currents 250-450V can only be used for 380V AC current: AC 0-100.0A, current resolution is 0.01A. Frequency: 45.0Hz -- 65.0Hz Power factor: 0.00-1.00pF Power: 0-450000W. When measuring the power between 0-9999.9W, the power resolution is 0.1W; otherwise, the power resolution is 1W. Power: 0-99999kWh, power resolution displays 0.01 kWh when measuring 0-999.99kWh, power resolution displays 0.1 kWh when measuring 1000.0-9999.9kWh, power resolution displays 1 kWh when measuring more than 9999.9kWh Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Multi-Functional Meter