A system and method for removing narrowband noise from an input signal in which notch filters having notch frequencies corresponding to the noise are dynamically adjusted in accordance with a detected noise spectrum. The multiple display screens either consisting of double sided display screens, being slidingly engaged in a monitor housing having rails or being attached by a multiple axis pivot structure. The trimming mask has at least two trimming openings for producing at least one alternating phase shift. The account may include prepaid charging minutes that are debited as wireless power is provided, or the account may be billed for the wireless power that is provided. The first arm is pivotally connected with the top surface of the coupling base.