A system includes an interface to communicate with a handheld device, and a processor to interact with the handheld device through the interface to enable the handheld device to emulate a pointer device function and a display function of the system. The carriage includes a plurality of types of droplet ejection head units and a plurality of ink-curing light irradiation sections. The method comprises detecting an occurrence associated with an authentication device. And thereafter, an interlayer conductive portion being electrically connected to the internal circuitry is formed, and a minute circuitry is formed on the top of the base material and the conductive foil accordingly. Embodiments of the invention provide an electrically-pumped VCSEL having a number of different p-i-n junction and electrode arrangements, which, in various embodiments, allow independent biasing of the multiple active regions, and, in other embodiments, allow simplified electrical connections. These scheduled transmissions allow the terminal units to perform required processing functions outside of the reduced noise period.