Perixx PERIBOARD-505H PLUS, Wired USB Trackball Keyboard - Built-in 2x USB2.0 Hubs - 12.40x5.79x0.83&rdquo; Dimension - US English Layout 12.40x5.79x0.98 Inches Mini Size Built-in 0.55 inches Optical trackball for Easy control of mouse function Fit with various industrial and Professional use 5.90 feet durable cable; Built-in 2 USB hubs System Requirement: Windows 7,8, and10; Package includes: 1 PERIBOARD-505, 12-month limited warranty