Mechanical Red Switches:Professional mechanical red switch, with tactile and quiet clicking sound, provides fast and precise button functions Plug & Play:No drivers required,Type-c usb interface. Supports NumLock, ESC, Tab, Delete etc Extreme Durability:Ensures 50 million times keystrokes, Never Faded Key Characters. ABS construction stand up to tough conditions Ergonomic Design:The stepped keycap, fit your hands easily to prevent fatigue. Spring type ergonomic design, care for your wrist. Works with PC and desktop computers that have Windows 2000 / XP / Vista / 7 / 8 / 10, Android/Linux/IOS Expand Your Desktop:21 keys mechanical numeric keypad is suitable for laptop users, banking, financial securities, business workers or other keyboards without numeric section. Small and light, easier for you to carry anywhere