Note Before Order: - The voltage of this product is 220V-240VAC phase to neutral,50/60Hz380-415VAC phase to phase, It cannot operate in a voltage of 110-120VAC!!!- This product cannot be directly connected to ZHA, and can only be paired with Home Assistant through the Zigbee2mqtt dongle.- It can only measure the total energy and cannot measure the energy of each phase separately.- The bidirectional monitoring function can only be viewed on Home Assistant and cannot be displayed on the Tuya app.- This 3-phase energy meter has two versions, WiFi and Zigbee. Please check carefully which version you need before placing an order. Product Description: *SDM01 smart energy monitor is a monitoring device that consists of a 18mm-width (1MW) monitor installed at DIN rail and three split-core current transformers (CTs). lt can work like a professional 3-phase energy meter that measuresvarious types ot electrical data - such as voltage, current, power and energy- at real-time. Feature: - WiFi Control: No need hub or gateway, works with WiFi 2.4Gh, Tuya App/ Smart Life App control.- Zigbee Control: support Tuya Zigbee Hub control/Home Assistant control via Zigbee2mqtt dongle( For details, please refer to this link: https://www.home-assistant.io/integrations/tuya/)- Electrical Measurement: High-Accuracy metering (class 1)/Real-time Measurement/Bi-directional Monitoring/Three Phase & Individual Phase Monitoring/Different CT size up to 120A Meaurement.- Bi-directional Measurement: Bi-directional measurement of power and energy flow. (NOTE: This feature only allows the Zigbee version of 3-phase meter to view specific values and charts on Home Assistant through Zigbee2mqtt, which is not supported on the Tuya app.)- 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 safety of household electricity.- Easy installation: Monitoring module reguiring only 1MW at DIN rail and associating with compact split-core CTs/Withdrawable connector for CT connection/Withdrawable connector for voltage take-offs connection.- Safety: Abnormal usage Alarm/ Over-consumption, Overload Alarm, Over/Under voltage Alarm. SDM01-TZ0-12(Zigbee 3 Phase Energy Meter ) SDM01-TW0-12(WiFi 3 Phase Energy Meter )