kensington Mouse K72359WW Nano USB Expert Mouse Wireless Trackball

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 (7, 8, 8. 1, and 10), macOS (10. 8 and later), and Chrome (OS 44 and later); 3 year and lifetime technical support
Large 55mm ball design and Diamond Eye optical tracking for precise cursor control; Award-winning scroll ring lets you scan up and down pages with ease
Note : In case of Wireless mouse, the USB receiver will be provided inside or along with the mouse