... keyboard.It's thin, soft, waterproof, long lifetime and easy to pucker. It is mainly used in office, hospital, lighting keyboardThis EL keyboard ... , alkaliproof, thin(0.86cm), key-press no voice, easy-curved and puckered, soft light at night, long life-span ... directly connected to laptop or computer.-specification:85 key board, 109 key board.-advantages: water proof, dustproof, acidproof, alkaliproof ...