Note before purchase:This product has two different versions, WiFi and zigbee. Please carefully check which version you need before placing an order. Zigbee Version: support Tuya Zigbee Hub control. New update version, mini size and with wide volatge. Two Way Metering: It can accurately measure both the electricity consumption in the home and the amount of solar energy produced. Unbalanced-load Alarm: when the load is unbalanced, it is necessary to check the electrical box in time to prevent short circuit and protect the of household electricity. Easy-to-use: Installation alone can help EV charger meet residual current Measuring of Voltage, Current, Power, Power Factor, Energy. High-precision of energy measurement within tolerance 1percent . Alarm message delivering in the event of abnormal power supply. Energy measurement: Accumulated energy, Hourly or Daily or Monthly energy. Measured key data: Voltage, Current, Power, Power factor, Temperature. Alarm sending: Over or under voltage, High temperature, High power, High consumption 1MW (18mm) width ultra-compact design. Colour:White Material:plastic Package Contents: 1 x 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.