Wide Applicability - Suitable for all kinds of surface cleaning, such as PC/laptop keyboard, calculator, fan, toy, car vent, even desktop can be cleaned. Safe & Environmentally Friendly - Made of high-quality materials, it is biodegradable, safe, non-toxic and environmentally friendly. Besides, this cleaning gel has passed the MSDS certification to ensure it is harmless for humans. NOTE: Non-edible, please keep away from children. Convenient - Take out a piece of the cleaning gel, slightly press it on the surface of the keyboard and then pull it up slowly to remove the dust.