Please note that this product requires a Tuya ZigBee gateway to function. Specifications From the app you can read: Schedule selection. (KWh) Weekly electricity. (KWh) on the ?Smart? page Daily electricity. (KWh), on the ?Smart? page. Monthly electricity. (KWh) on the ?Smart? page Current electricity (mA), Current power (W), Current voltage (V), Please note that this is not a two-way meter, it can only measure the consumed power. And only displays positive data in the application. Technical Data: Rated Voltage: 100-240V AC 50/60Hz Measurable Current Range: 0.2A-80A Protocol: ZigBee WiFi Frequency: 2.4 GHz (does not support 5 GHz) Ambient Temperature Range: -10 °C ~ 55 °C App Real-time Monitoring of Consumed Energy KWh. Voltage, current, and power, can also monitor the device's working status Electricity and Cost Statistics You can view daily, weekly, monthly, KWh, and other costs of consumed electricity. During the period in the application Automation, it allows you to create a scene for this device to work with other Tuya devices Set up device automation, For example, if the power or current is above the value, another Tuya device starts to work. Automation sends notification Unconnected for safety, easy and secure to install No need to change wiring, just put the wire into the clamp, and it can measure, very easy. Small module, easy to install Q&A Q: Why does the app show "stopped" after I configure it with the app? A: Only if you put the wire of a device (the phase wire or the neutral wire, not both) into the clamp and turn on the device, can the clamp detect the current and the app shows it is working. Q: I assume P=U*I, why is the value shown in the app not correct? A: Consider cos(µ). Because resistance does not produce any phase shift (phase displacement) between the voltage and current waves, all usable power is delivered directly to the resistance and converted into heat, light, and work. Then the power consumed by a resistor is the real power which is basically the average power in the circuits. To find the corresponding value of the real power, the RMS values of voltage and current are multiplied by the cosine of the phase angle, µ shown. Real Power P = I2R = V * I * cos(µ) Watts, (W)