The device includes a master module and a slave module. The master module includes a control unit for controlling overall operation of the master module, a power unit electrically for storing electricity to supply the master module, an electricity transmission unit for receiving electricity from the power unit and wirelessly transmitting the electricity; and a communication unit for communicating of the master module. The slave module is electrically connected to the master module and includes a control subunit for controlling overall operation of the slave module, a communication subunit for wirelessly communicating with the communication unit, an electricity reception unit for wirelessly receiving the electricity from the power unit of the master module, a storage unit for storing electricity from the electricity reception unit and supplying power to each unit of the slave module, and an electricity transmission subunit for wirelessly outward transmitting electricity of the storage unit.