Features: Available in four standard versions: 300V with built-in CT, 300V with external CT, 450V with built-in CT, and 450V with external CT. Voltage: 40-300V/250-450V, Current: 0-100A, Active Power: 0-30000W, Electric Energy: 0-99999kWh, Frequency: 45-65Hz, Power Factor: 0-1PF. Colorful LCD display with backlight function, ensuring clear visibility day or night. Constructed with high-quality ABS flame-resistant material and precision chip for safe and accurate operation. Easy to install and suitable for both indoor and outdoor use. Ideal for homes, schools, markets, industrial settings, laboratories, and more. Specifications: Material: ABS Size: 54x80x64mm / 2.1x3.15x2.5in Model Options: 300V with built-in CT, 300V with external CT, 450V with built-in CT, 450V with external CT (selectable) AC Voltage: 80.0-300.0V / 300.0-450.0V (depending on selected range) AC Current: 0-99.99A, minimum resolution 0.01A Power Frequency: 45.0Hz-65.0Hz Power Factor: 0.00-1.00PF Active Power: 0-45000W; display accuracy is 0.1W when power is between 0 and 9999.9W Electric Energy: 0-999999kWh; display accuracy is 0.01kWh (0-999.99kWh), 0.1kWh (1000.0-9999.9kWh), and 1kWh (10000.0-999999kWh) Update Speed: 2 times per second Installation: 35mm Din Rail mounting Note: Please allow 1-3cm error due to manual measurement. Ensure you are comfortable with this before purchasing. Due to differences in monitor displays, the actual color of the item may vary from the image. Package Includes: 1 x Energy Meter