The new version supports bidirectional measurement and photovoltaic measurement Single or 3 - phase electricity compatible.Three current for Single phase application Measures real-time Voltage, Current, PowerFactor, ActivePower and total energy consumption Display the temperature of the device on the App Suitable for both residential and commercial application Important 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. type: 300A Material: plastic colour: white Package Contents: 1 x 3 Phase WiFi Energy KWH 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.