industrial keyboard metal keyboard with trackball, waterproof IP65, vandal proof IK07, CE, FCC , ROHS ... System 2.comply with ISO/IEC 9995GB/T14081 standard 3.Keyboard made of high quality stainless steel4. Dustproof, waterproof, shake-proof ... Platform.Interfaces1.PS/2 or USB2.65keys Mechanism Performance 1.Keyboard lifespan: more than 2 million2.Force on keys: 3-5N3 ...