KUL ES-87 Tenkeyless Mechanical Keyboard (Cherry MX Black) "Tenkeyless" 87-key US ANSI layout w/US English legends Authentic Cherry MX Black "Firm Linear" Switches w/4mm keystroke and Gold-Silver (AuAg10) contacts; rated up to 50 million keypresses MS Windows, MacOS, and Linux/Unix Compatible MacOS Compatibility Mode - NOW macOS 10.13 High Sierra Compatible USB 1.1 Low Speed and PS/2 with included passive interface ABS keycaps with lasered legends; key-pitch 19.05mm