Real-time Energy Data: Requires 2.4 GHz Wi-Fi with an internet connection to monitor energy use with phone app. It accurate from±2%.Accurately record hourly, daily, and monthly power consumption to optimize power consumption in real time. Bi-directional Power Monitor :This smart home energy monitor with 1 clamp, it can support usage measurement.It supports power metering on each channel,2 channels on the same phase. Energy Monitoring: This electricity consumption monitor can record Voltage, Current, Power Factor your home's anywhere, Active Power and frequency to prevent costly repairs, conserve energy and save costs. Important Safety Information: The power clamp must be installed and serviced only by a qualified .Do not touch the terminals of the device during testing and turn off all the power supply for this equipment before installing. Keep you safe. Easy to use：Product size 5.16*2.3*4.6cm,small volume and lightweight and easy to install, it with 1 pcs Power Clamp helps you monitor the amount of electricity usage in your facility by connecting the clamp on to the power cable., Manufacturer: OWON