Kensington Orbit Wireless Trackball with Scroll Ring - Black - Optical - Wireless - Bluetooth - 2.40 GHz - Black, Red - 1600 dpi - Scroll Ring, Scroll Ball - Symmetrical

The Kensington Orbit Wireless Trackball Mouse with Scroll Ring puts cursor control under your fingertips while your hand and arm stay still. Roll the 40 mm ball to move the pointer, and spin the scroll ring around it to move up and down web pages, spreadsheets and documents. Because the trackball stays in one place, it needs far less desk space than a mouse and cuts down on wrist and arm movement. The ambidextrous design works equally well for right-handed and left-handed users, and a detachable wrist rest adds cushioned support.

Use the 2.4 GHz USB receiver for a dedicated connection, or pair over Bluetooth 3.0 or Bluetooth LE. Both connections use 128-bit AES encryption. Four DPI settings let you choose precise or fast cursor movement, and the free KensingtonWorks software lets you assign shortcuts to the buttons and adjust cursor and scrolling speed.

• Connectivity: 2.4 GHz wireless (USB receiver) and Bluetooth 3.0 and LE
• Encryption: 128-bit AES
• Ball size: 40 mm
• Tracking: optical
• DPI settings: 400, 800, 1200 and 1600
• Design: ambidextrous, with detachable wrist rest
• Software: KensingtonWorks (free download)
• Construction: plastic