KUL ES-87 "Smoke" (Limited) Tenkeyless Mechanical Keyboard (Cherry MX Blue) "Tenkeyless" 87-key US ANSI layout w/US English legends Authentic Cherry MX Blue "Soft Click" Switches w/4mm keystroke and Gold-Silver (AuAg10) contacts; rated up to 50 million keypresses MS Windows, Apple OS X, and Linux/Unix Compatible USB 1.1 Low Speed and PS/2 with included passive interface ABS keycaps with lasered legends; key-pitch 19.05mm