In a non-aqueous electrolyte comprising an organic solvent and a solute dissolved in the organic solvent, a lithium salt containing at least one organic anion selected from phthalimide, a derivative of phthalimide, phthalimidine and a derivative of phthalimidine is used as the solute. In certain embodiments, an interferometric modulator includes a first electrode and a flexible second electrode situated on a substrate. When there a plurality of content data intended to be simultaneously reproduced by the data distribution side, it is judged by a parallel reproduction judgment unit, and the data reproduction unit reproduces the content data in parallel. Also, it can be advantageously used in high-temperature and high-humidity areas, because external impact or pressure is relieved because it is absorbed by asphalt. Desirably, the mounting members allow side rails of a frame to be attached to the table top and at least a portion of the side rails are disposed between the first and second lips. This may prevent accidents or errors which may occur as the robot cleaner operates.