Features: By adopting a WiFi connection and a high precise measurement, real-time viewing of Voltages, current, and power of each channel when generating and consuming kilowatts by application to realize intelligent management. The application displays real-time power, current, Voltages, power factor, frequency, and electricity statistics for each channel in forward and reverse directions. With the power statistics function, you can view daily, monthly, and year electricity by application and keep track of the power consumption at all time. With the automation function, you can set the power or current value in the application. When the power or current exceeds the set value, the device will initiate to work. With a calibration function, the device can be calibrating by adjusting the percentage. 35mm rail mounting, no need to replace wire connection, safe to use, just put wire in clip and measure. Specifications: Materials: ABS Styles: Double channel/Single channel Size: about 4.6x4.6x1.8cm/1.81x1.81x0.71inch Input: 110-240V 50/60Hz Measurement current ranges: 0.2A-50A Package Includes: 1Pc Power Voltages Current Meter note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.