Item Type: WiFi Smart Energy Monitor Circlip: 1 x 120A For ZigBee: 3.0 RF Feature: 2.4GHz working frequency, with built in antenna. Working Voltage: AC 90-250V 50/60Hz Measuring Voltage Range: 0.2A-120A Calibration Measurement Accuracy: ≤ 100W, within ± 2W. >100W, within ± 2 percent . Reporting Cycle: Every Minute Temperature Range: -20-55 ℃ Humidity Range: ≤ 90 percent Non Condensing Installation: 35MM DIN Rail 1,Better Monitor: This device can monitor bidirectional energy consumption. If the user has a solar photovoltaic system at home, after installation according to the wiring diagram, the device can monitor the electricity generated by the solar photovoltaic system and the energy consumed by the power grid. 2,Wide Test Range: Smart energy meter with a 120A current transformer CT clamp sensor, and the current measurement range is 120A. You can view the hour, day, month and year energy consumption records on the APP, which can keep records for up to 1 year. 3,Real Time Measurement: The intelligent power monitor can be used for residential and store applications to monitor and measure energy usage, voltage, current, power factor, active power, and frequency in real time. 4,High in Safety: The power monitoring meter has an overload protection function, which can effectively avoid electrical failures and safety issues caused by excessive energy consumption. 5,Easy Installation: There is no need to change the wire connection, just put the wire into the clip and measure it.Use in conjunction with for Zigbee gateway.1 x WiFi Smart Energy Monitor 1 x User Manual