Tuya compliant. Support automation with other Tuya device Single, Split-Phase120/240VAC,3-Phase/4-wire 480Y/277VAC electricity system compatible Remotely monitor whole 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 Specifications: WIFI-SP360-300A Colour:White Material:plastic Product Parameters Operating Voltage:90-277 Vac 50/60 Hz Calibrated Metering Accuracy:2% Reporting Cycle:Every 15 seconds Operating Temperature:-20-+55 Operating Humidity: Less than 90% non-condensing Wi-Fi:802.11 b/g @2.4GHZ RF Characteristics:Operating frequency:2.4GHz/External magnetic antenna Supported Systems:Single-Phase 240VAC line-neutral/Split-Phase 120/240VAC/ Three-Phase up to 480Y/277VAC(No //Y/Star Connection Important Safety Information for Installation! The power meter must be installed and serviced by qualified electricians. Do not touch the terminals of the device during testing. Turn off power before connecting or disconnecting auxiliary equipment. Use appropriate Double check that the power supply is off with the rated voltage sensing device. Package Contents: 1 set * Real-time power monitor 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.