The WMC HiLo – Wonder Mains Combo, is a premium high quality, high level Mains Power, Load-Shedding (with Automatic Voltage Regulator) and Surge Protector device guarding equipment and appliances on any electrical mains line with proprietary designed circuitry that performs a health check of the socket it is plugged into for correct grounding (earthing), which is an important requirement for effective surge protection.