It has multiple voltage, current, residual current and temperature monitoring channels. Each channel works independently and is configured separately, suitable for various application scenarios. It has built-in 2G/3G/4G/NB/WIFI wireless communication function, which can be directly connected to the cloud monitoring platform. It has RS485/CAN local communication interface, which can be connected to a variety of digital instruments and sensors. It has a built-in backup power supply, which can detect normal power outages and equipment failures. The SMS alarm function can notify the relevant responsible persons in time.