Black metal keyboard with trackball waterproof IP65, vandal proof IK07, CE, FCC , ROHS certificated. Black Metal keyboard with trackballBasic Instruction1.Support ... System 2.comply with ISO/IEC 9995GB/T14081 standard 3.Keyboard made of high quality stainless steel4. Dustproof, waterproof, ... 1.Keyboard lifespan: more than 2 million2.Force on keys: 3-5N3.Key travel: >2.5mm4. Diameter of trackball: 38mm ...