Multi-Function sim-card kWh Meter. Meter can be read from any lap-top, PC, netbook, capable of internet connection. Wall-Mounted LCD Digital kWh Meter : CT-operated Ofgem & MID Approved 5A CT operated 3 Phase kWh meter COP5 compatible Import/Export Energy Multi Tariff with Internal Clock These meters are designed ONLY to work with CTs. Please select the preset ratio below and add CTs if required You can order with or without CTs