... .It's thin, soft, waterproof, long lifetime and easy to pucker. It is mainly used in ... four parts of silica gel, film switch, luminescent sheet and driving circuit. It has the characteristics of waterproof ... thin(0.86cm), key-press no voice, easy-curved and puckered, soft light at night, long life-span. ... used in office, hospital, internet bar, lab and so on.- name:EL key board.-colour:various colour ...