PC311- Power Clamp helps you monitor the amount of electricity usage in your facility by connecting the clamp on to the power cable. It can also measure Voltage, Current, PowerFactor, ActivePower. Tuya Smart Energy Meter with Clamp 80A. New two-way measurement technology, more convenient. Lightweight and easy to install. Support Tap-to-Run and automation with other Tuya device. Energy Control & Management PC311- Single phase Power Clamp Main Features: Tuya compliant Single phase electricity compatible Measures real-time Energy Usage, Voltage, Current, PowerFactor, Active Power and frequency. Support Energy Production measurement Usage by day, week, month Suitable for both residential and commercial application Material: plastic colour: white Package Contents: 1 x Tuya Smart Energy Meter 2 x CT Transformer 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.