Material FRONT PANEL: 304 stainless steel, BACK PANEL: aluminum Number of keys 18 Key Switch Metal dome switch technology Switching cycles more than 5 million actuation Power Supply 5v DC /-5% Trackball Diameter 38.0mm Resolution 800 dpi Tracking Force 0.196N (20gf) max Interface PS2 or USB EMC Standard EN 55032:2015 , EN 55035:2017 Temperature Range Operating: -20°C to 55°C, Storage: -30°C to 60°C Compatibility All Windows, Linux, Mac Warranty 1 year Certification CE/FCC/ RoHS/IP67
