Perixx Periboard-521 Wired Trackball Keyboard with Numeric Keypad, Build-in 0.55 Inch Trackball with Pointing and Scrolling Feature, Full Size, US English Layout,Black,PERIBOARD-521 US

"Simplicity is the ultimate sophistication", the practice philosophy of PERIBOARD-521. Full-size keyboard with built-in 14 mm trackball makes it perfect for leisure time and work. Special trackball scrolling and DPI (1000/1600) switching feature is just one effortless click away. You will be amazed by how those detailed design will make your work a lot easier. While meeting customer's desire of a versatile keyboard, we still strive to keep the user-friendly number pad to maintain a full-function keyboard with succinct design. With its gentle typing feeling and quiet sound, PERIBOARD-521 is going to be your next favorite keyboard. Windows XP, Vista, 7, 8, 10 USB portspecification keyboard Dimension: 456x160x30 mm> trackball size: 14 mm> trackball color: Dark red trackball sensor: Optical> trackball DPI: 1000/1600 (switched by pressing fn+f9) trackball scrolling function: Yes (fn+f10) approximate weight: 684 g connection: USB cable length: 1. 8 meters> key switch type: membrane key press life cycle: 10 million times keyboard tracking method: trackball with pointing feature> hot keys: 10 integrated hubs: N/a backlit: N/a keyboard type: Wired trackball keyboard.