koolertron single-handed programmable mechanical keyboard with cherry mx red switch,all 48 programmable keys tools keypad,8 macro keys, pbt keycaps.[smkd72-a]Tips: User can download the keyboard configuration software from URL on user manual. Compatible with Windows 7,8,10, Mac OS, Linux. (Windows XP incompatibled) If you can't find the software download link, please feel free to contact us. Apple computer and Linux users need to set the keyboard under the Windows 7/8/10. Once set, it will be stored in the keyboard's MCU, and then get the keyboard to use under Apple computer/Linux Programmable Keys: Create both single key and macro definitions, with the ability to activate a combo with the single press of the key. The macro editor also allows users to set and edit the millisecond delays between keystrokes. Specifications: Key number: 48 Keyboard switch: Cherry MX Red Keystroke force: 4515cN Backlit: No backlit All 48 keys are programmable, 8 Macro Keys Interface: Mini USB (Full Speed), Link (interconnect) Rating: DC 5V,