An electricity meter includes a sensor circuit, a measurement circuit, a leading PF detection circuit and a control circuit. This invention provides an user friendliness, accuracy, cost-effectiveness and improved version of simplified microarrays technology. The metallic assembly is hooped. In response to receiving in the requests, an operation is performed for multicasting the offered content for reception by each one of said end user download devices in the group. The second level page table is addressable by at least one entry of the first level page table.