Vertical Thumb Trackball Mouse (Bluetooth + 2.4G) — 54° Ergonomic, Silent, Programmable, 34mm Roller Ball — Black

Ergonomic 54° vertical profile positions your wrist and hand in a more natural grip to help reduce wrist strain, muscle stiffness and fatigue during extended use. The 34mm trackball lets you move the cursor precisely without shifting your hand, eliminating repetitive wrist motion. Dual wireless connectivity lets you pair two devices and switch between them using Bluetooth or the included 2.4GHz USB receiver. A bottom-mounted button toggles between connected devices, and a built-in USB dongle storage slot keeps the receiver secure when not in use. Quiet left/right clicks minimize disturbance in shared or late-night environments. Choose among three DPI settings (800/1200/1600) to fine-tune cursor speed; the advanced Blue LED sensor together with a ruby tracking point and smooth trackball provide superior tracking over a wider variety of surfaces and greater precision than a red sensor. Downloadable software enables button remapping for custom shortcuts and productivity boosts; dedicated forward/back keys simplify web browsing and document navigation. This rechargeable ergonomic mouse features an auto-sleep power-saving mode and wakes instantly when you click the left or right button. Broad compatibility includes Windows 11/10/8.1/8, Mac OS 12/11/10.14~10.15, Chrome OS, Android 8~12, iPad OS13~16, iOS13~16 and earlier versions. Works well in tight workspaces and on non-flat surfaces such as your leg, sofa, bed or carpet. Includes a 1-year warranty and lifetime technical support.