Kensington Expert Wireless Trackball Mouse (K72359WW) Black, 3.5" x 6.1" x 8"

Key Features

• 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
• Detachable, ergonomic wrist rest supports hand and wrist for improved comfort; Ambidextrous design
• Customizable 4-button design, scroll speed and cursor speed via KensingtonWorks software
• Connects wirelessly via built-in Bluetooth 4. 0LE or with the USB dongle using 2. 4Ghz wireless; Auto-sleep helps conserve battery life
• Compatible with Windows, macOS (10. 8 and later), and Chrome (OS 44 and later); 3 year coverage and lifetime technical support