Quality Guarantee We guarantee good quality, every product will be tested before delivery. Note Before Order - Tuya ZigBee Gateway Is Required 1. Tuya ZigBee Gateway Is Required to Connect with this Device to Work, If You Don't Have the Gateway Yet, Please Click Below Picture to Buy 2.It's high Amp item, and the device needs certified and professional electrician for wiring. 3.The frequency of the wireless router is 2.4GHz. Main Features Tuya compliant Support Tap-to-Run and automation with other Tuya device Single/3 - phase electricity compatible Three current transformers for Single phase application Measures real-time Voltage, Current, ActivePower and total energy consumption Suitable for both residential and commercial application Lightweight and easy to install External antenna prevents signal from being shielded Clamp Diameter 80A10mm 120A16mm 200A20mm 300A24mm. 500A: 36mm Warning Important safety information: The power clamp must be installed and serviced only by a qualified electrical personnel. Do not touch the terminals of the device during testing. Turn off all the power supply for this equipment before installing. Always use a properly rated voltage sensing device to confirm power is off. Replace all devices, doors and covers before applying power to the equipment. Failure to follow these instructions will result in death or serious injury. When you install the CT , please note the CT's direction, make sure all 3 CT with the same direction. Please follow the arrow's direction to install the CT Single Phase and 3 Phase Wiring Diagram For safety, please make sure the main power in your faciligy is off before installation. According to your need, you can make 2 kinds of wiring connection. NEW Version with External Antenna Real-Time Monitor each phase's power, voltage, and current, but not able to monitor each phase's KWh, can real time monitor total 3 phase's KWh View Electricity Consumption History Daily Weekly Monthly App Smart 1. Please make sure your App version is the latest version above 3.35.0 2. Please Click 'Smart' icon to Find the Power Usage page Press and hold the reset button for 5 seconds until the LED indicator flashes 3 times quikly to restore factory settings (energy data will be cleared). And it will get into EZ mode for 3 minutes.