... it is also available with optional LED backlighting. Engineered for NEMA 4X protection from dust, water and corrosive liquids. This keyboard is ... is protected against dust, dirt, grease and corrosive liquids to NEMA 4X, which means it can withstand directed hose water, disinfectants, environmental ... , 14.0mm x 28.0mm for enter key and space bar key. Switch life: more than 10 million of operations. ...