A method for data communication is provided and may include storing multimedia data in a first database, the multimedia data being associated with assigned metadata stored in the first database. A gas flow channel for flowing gas out of the combustion chamber is formed in the body. In turn, the digital audio device sends a stimulus based on that input signal to the human user, who takes an action, usually in the form of an output signal, to characterize the stimulus that the user receives, based on the user’s perception. The solar energy absorption board and the transparent protective hood are of arc-shape so that the sunlight can be converged onto the solar energy absorption board and at the same time, dust particles and birds’ excrement or fallen leaves will not be collected on the surface of the hood surface. The routing device includes a stationary base that supports an adjustable ramp.