A method of processing an image signal comprising image and depth information is provided. The controller is programmed to monitor a maintenance condition of the electronic faucet and to selectively open and close the valve to generate a fluid flow pattern through the passageway to provide an indication to a user of an existing maintenance condition. The polymers can be combined with other dielectric materials to form composites having uniform composition and morphology. By using the determined starting frequency band associated with the home country and home network of the user, fewer andor shorter delays may be experienced when searching for and acquiring an available frequency.