Kensington Orbit Wireless Trackball with Scroll Ring - Space Gray (K72675WW),Black /Grey & Expert Wireless Trackball Mouse (K72359WW) Black, 3.5 inch x 6.1 inch x 8 inch

Features

• Product 1: Dual wireless connectivity offers the flexibility of 2.4 GHz and Bluetooth (3.0 and LE), with 128-bit AES government-grade encryption security
• Product 1: The scroll ring lets you spin the dial to move up and down web pages or documents with complete ease. And the 40mm balls hard surface is specially designed as a perfect sphere for precise tracking and control
• Product 1: Four DPI settings let you easily adjust the cursor speed to fit your needs by selecting the appropriate level (400, 800, 1,200, or 1,600) lower DPI for precision editing, and higher DPI for word processing or casual browsing
• Product 1: Ambidextrous design works equally well for right-handed and left-handed users. Trackball reduces wrist and hand movement to ease repetitive-stress injuries
• Product 2: Large 55mm ball design and Diamond Eye optical tracking for precise cursor control; Patented scroll ring lets you scan up and down pages with ease
• Product 2: Detachable, ergonomic wrist rest supports hand and wrist for improved comfort; Ambidextrous design
• Product 2: Customizable 4-button design, scroll speed and cursor speed via KensingtonWorks software
• Product 2: Connects wirelessly via built-in Bluetooth 4. 0LE or with the USB dongle using 2. 4Ghz wireless; Auto-sleep helps conserve battery life