This is a Schneider Electric single-phase static watt-hour meter (model DDS6969) designed for residential or small business use.
It operates at 220V with a nominal current of 30A and a maximum rating of 100A.
The device measures electrical energy consumption in kilowatt-hours (kWh) and is designed for 50Hz frequency systems.
It features a digital display for tracking energy usage and is commonly used as a check meter. [1, 2, 3]