... alkali, shockproof,3.Can be arbitrary curly, easy to carry,4.High low temperature deformation, mute design, small ... Long durability, life of 10 million or moreEnvironmental protection3.Foldable keyboard4.Sealed the design5.Environmental protection non-toxic, waterproof, ... and alkali, shockproof, can be arbitrary curly, easy to carry,high low temperature deformation, mute design, small size, ...