Original Flavour of Blue Switches You might wonder inches why blue inches Yes, it’s a little bit clicky but it is authentic and original which is the most distinctive mechanical switches. It will remind you with the first feeling about mechanical keyboard, incomparable click feedback and refreshing tactile feel will breathe the BGM into your tedious digital input work. | Plug & Play No drivers required; USB port required.The mechanical numpad works with PC and desktop computers and compatible with systems such as Win2000 / 10/8/7 / ME / XP / VISTA, MAC, Linus. | Sturdy & Durable Aluminum and ABS construction stand up to tough conditions. Tested over 5 million times, these keys are expertly designed for frequent digital input work and offer good reliability, high responsiveness and a clear, light touch. Never Faded Key Characters owing to the double-molded injection. | 22 keys & Ergonomic Design Equipped with inches NumLock', inches () inches , 'Tab inches , and 'Delete' keys, the numeric keypad is perfect for anyone doing Excel table creation, accounting affairs, or finance work. The stepped keycap, fit your hands easily to prevent fatigue. Spring type ergonomic design, care for your wrist. | No input delay & signal interference prevention The USB connector of the mechanical numpad has a gold-plated interface and also features high-speed transfer. In addition, the USB cable is equipped with a signal interference prevention device, which makes data transfer operation commands more stable and quick.