A wireless power distribution system and method for power tools and other battery-powered devices. When the image density reaches the threshold value, the control unit modifies the amount of heat supplied to a print head, thus modifying the amount of ink applied to subsequent lines on the page, in order to provide compensation for the image density. Thus, the instant disclosure provides the circulation module for receiving the rolling units quickly and simplifying the construction of an end cap module mating thereto. The implementation of this invention would result in a higher rate of delivered messages to the Customer. A plurality of electrode terminals are provided and arranged on a top surface of the semiconductor substrate, a sealing resin layer is formed on the top surface of the semiconductor substrate such that the electrode terminals are completely covered with the sealing resin layer. In the apparatus, an adder receives a digital baseband signal comprising a DC component, receives an estimated DC offset value, and calculates a difference between the digital baseband signal with the DC component and the estimated DC offset value.