Tuya compliant. Support automation with other Tuya device. Single, Split-Phase 120/240VAC,3-Phase/4-wire 480Y/277VAC electricity system compatible. Remotely monitor whole home Energy and up to 2 individual circuits with 50A Sub CT, like Solar, lighting, receptacles. Bi-Directional measurement. Real-time Voltage, Current, PowerFactor, ActivePower, Frequency measurement. Historical data of Energy Consumed and Energy Production. The CT is removable and suitable for 3-phase 4-wire (U.S. commercial and European homes), single-phase three-wire (U.S. homes), and single-phase two-wire (European homes). The 3 main clamping rings and the 2 auxiliary clamping rings all support bidirectional measurement. If the clamping rings are reversed, the power will be negative. If the secondary clamping ring is measured in the opposite direction, the phase needs to be manually set by the App. In other cases, it is automatically recognized. Multiplex measurements. Simultaneously measure solar energy and grid electricity consumption, and can also measure electrical appliances separately. Supports hour, day, and month dimension viewing, as well as the option to compare consumed and generated energy data. Current, active power, voltage, frequency, power factor and other real-time data. Active power and current real-time data of the auxiliary clamp ring. Supports Tuya's linkage and Tuya's low-carbon energy saving, such as grid output and solar energy generation. 200A main clamp ring + 50A auxiliary clamp ring. Rail-mounted wall hanging, can be mounted on the wall or railed. Colour:White Material:plastic Package Contents: 1 x Main unit 3 x 200A main CT 2 x 50A Sub CT 1 x External antenna 1 x power cable 1 x Installation bracket 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.