MECHANICAL BLUE SWITCH - Professional blue switches mechanical numpad provides quick triggering, tactile feedback and audible click when a keystroke is registered. Perfect for typing, programming, and playing strategy games.(Warm Tips: not hotswap switch) | PLUG & PLAY - No drivers required, easy to use. Number keypad supports Num, ESC, Tab, Delete and a shortcut key which can quickly access to calculator to improve productivity. | BLUE BACKLIT - 3 backlight modes: full-lighting, breathing, lights-off turn on and off by ”Esc + Del”, bright and evenly distributed backlit keys, makes it easy to find the exactly keys when you are working in dimly lit rooms. | EXTREME DURABILITY - 10 key usb keypad with never faded ABS keycaps ensures 50 million times keystrokes. Gold-plated interface and magnet ring can to a large degree guarantees stable data transmitting | WIDELY COMPATIBILITY - Number pad for laptops and desktop computers works with Windows 2000/ XP/ Vista/ 7/ 8/ 10/ 11 operating systems. (Warm Tips: the keypad is not fully compatible with Macbook & Chromebook, the function keys do not work while the number keys part work fine) | ERGONOMIC DESIGN - The ergonomic stepped keys and 15° tilt designed numpad keyboard fit your hands easily and relieve fatigue of your wrist, makes your fingers less tired from typing.