Please note it's not bidirectional meter, it can only measure the consumed power. and only show positive data on App. The meter requires the measured device must have neutral wire. otherwise it can't measure the device's voltage, current, and power. Specifications: In the APP It Can Display: Hourly Elec. (KWh), Today Elec. (KWh), Monthly Elec. (KWh), Yearly Elec. (KWh), Current Ele(mA), Current Power(W), Current Voltage(V), Total Ele(KWh) Color: White Material: plastic Technical data: Rated Voltage:100-240V AC 50/60Hz Measurable Current Range: 0.2A - 63A WiFi Frequency:2.4GHZ Ambient Temperature Range:-10°C ~ 55°C App Real Time Monitor Energy Consumed KWh. Voltage, Current, and Power Electricity Statistic You can view hourly , daily , monthly, Yearly and total KWh Consumed in App. Automation , It allows to make a Scene for this device working with other tuya devices Set Automation for the Measured Device , For example, If Power or Current Is over the Value, then other tuya device starts to work Easy and Safe to Install Non-Connect to . No need to change your wire connection, just put the wire into the clamp, then it can measure. Package Contents: 1 x WiFi Energy Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Tuya Smart Energy Meter Current Transformer Sensor WiFi Energy Meter