A system for cordless transfer of power for appliances or electronic devices 30 has a power transferring device 80 with a plurality of magnets 52 driven by a motor 70B powered by commercial electric power devices or lines. The accessory includes a sensor which is selectively adjustable to align with a plurality of positions in the range of movement of an output needle of the analog metering device. This system enables a modulator to switch between the two streams generated by the two formatting modules without becoming desynchronized. The lower lid includes means for retaining a second attractant and a plurality of apertures, such that a second attractant plume may be generated that is spaced apart from the first attractant plume. A correspondence range is then provided and the maximum, mean value and minimum are set.