Features:1.DIY DESIGN: Red switch mechanical keyboard is hot swappable, you can change keycaps and key shafts as you like, colorful backlight.2.COMFORTABLE KEYS: Mechanical gaming keyboard keys are ergonomically designed with curved surfaces to fit the human fingers for easy and comfortable triggering.3.COMPATIBLE SYSTEMS: Compatible with for Windows, for Linux, for OS X, for Android and for iOS systems. Please set it up on for Windows system or for OS X first, then you can use it freely on other devices.4.WIDELY USED: 3 keys programmable keyboard is widely used in video games, office work, PPT, sheet music page turner, equipment image catching, factory machine control, piano keyboard test and so on.5.DURABLE CONSTRUCTION: The One handed keypad features ABS and acrylic construction that can withstand up to 500,000 keystrokes. Mechanical switches give flexibility to every word you type.specification:Item Type: 3 Key Mini KeypadMaterial: ABS, AcrylicScope of Application: ComputerNumber of Keys: 3Switch: Red SwitchPackageList:1 x Keyboard1 x USB Cable