IP65 NEMA 4X Metal 38mm Trackball *Interface:PS/2; *Actuator/keys materials: 316#(RoHS) stainless steel; *Switch life: more than 2 million of operations; *Key travel: 2.50mm; *High quality 316#(RoHS) stainless steel; *Lifespan: > 5 years; *Actuation Force: 1N; *Contact Material: Carbon / Gold; *CE, RoHS, FCC; *IP Protection Class IEC/DIN/EN/ 60529:IP65 *IK Protection Class DIN EN 50102:IK07 *Faceplate dimensions:83X110 mm; *GW:0.25KG;