Kinesis USB Numeric Keypad, Cherry Low-Force Mechanical Switches (PC) Utilizes low-force, tactile Cherry MX Brown mechanical key switches Integrated 2-port, USB 2.0 hub Includes 4 bonus keys (Escape, Tab, Backspace & Keypad Equals) for increased editing efficiency. Long-lasting lasered key legends USB Connectivity. Compatible with virtually any PC operating system. CherryMX brown-stem mechanical switches have a low operating force and tactile feedback. 2 side-mountedUSB ports allows you to easily connect other input devices without having to accessyour computer. Cherrybrand mechanical switches are designed to last for 50M keystrokes. 1 Available USB Port Windows 7/8/10 (Compatible with most other PC-based operating systems) Plug-and-Play No special drivers required Key Count: 21 Switch type: Cherry MX brown, tactile mechanical Peak force: 55 grams Activation force: 45 grams Travel distance: 4.1 mm Width: 3.75 inches Depth (front-to-back): 6 inches Height: 1.25 inches Weight: 0.62 lbs Shipping weight: 1 lb Cable length: 6 feet