KUL ES-87 "Smoke" (Limited) Tenkeyless Mechanical Keyboard (Cherry MX Brown) US ANSI 87-key "Tenkeyless" Layout Mechanical Keyboard - MS Windows and Native OS X compatible Authentic Cherry MX Brown (Tactile) Switches w/4mm keystroke and Gold-Silver (AuAg10) contacts; rated up to 50 million keypresses USB/PS2 Interface w/ full N-key Rollover USB option DIP Switch options allow for customized configuration of Ctrl, Esc, and Backspace Low-profile extra-ridged design for serious reliability - designed by professionals, for professionals