... is mainly used in office, hospital, lighting keyboardThis EL keyboard consists four parts of silica gel, film switch, luminescent ... of waterproof, dustproof, acidproof, alkaliproof, thin(0.86cm), key-press no voice, easy-curved and puckered, soft light ... power: directly connected to laptop or computer.-specification:85 key board, 109 key board.-advantages: water proof, dustproof, acidproof, alkaliproof ...