UGREEN Wireless Trackball Mouse, Ergonomic Mouse with Finger Control, Rechargeable Bluetooth & USB Modes, 40dB Silent, Customisable Button, High-speed Roller, for Laptop/Desktop, Windows/macOS, etc.

Zero Displacement and Reduced Fatigue: This trackball mouse allows cursor movement to be controlled by your finger, eliminating the need to move the mouse and effectively reducing wrist and arm fatigue, making it suitable for working in confined spaces. Rechargeable and 140-day Battery Life: The wireless mouse is equipped with fast charging technology, and it can be fully charged within 2 hours. 140-day Battery Life(2H/Day) eliminates the hassle of frequent charging. Two Connection Modes: The computer mouse supports bluetooth and 2.4GHz USB connection. You can easily switch modes and connect the mouse to up to 2 devices at the same time. For example, the USB direct connection mode can connect to a desktop computer, while the Bluetooth mode can connect to a personal computer or tablet. 40dB Super Quiet: The silent mouse features a 40dB ultra-quiet button design, with a click volume lower than a whisper. Even in quiet environments like late at night or in a library, it won't disturb those around you, allowing you to focus on work or creation wherever you are without worrying about disturbing others Customizable Function Keys: This Bluetooth mouse allows you to set copy and switch to customizable buttons, reducing the burden on your left hand and significantly improving work efficiency. High-speed Roller: When browsing extremely long tables, a simple flick of the scroll wheel allows you to slide right to the end, completely freeing your fingers and eliminating the soreness of repeatedly rubbing the scroll wheel. The scrolling process is silky smooth and almost silent, ensuring undisturbed work even late at night. Multiple Adjustable DPI: The mouse uses optical tracking technology to achieve precise tracking on any surface. It has 5 adjustable DPI settings (4000/2000/1600/1200/800) to meet various usage scenarios. For example, 800/1200 DPI is suitable for daily office work, 1600 DPI is suitable for lightweight design, 2000 DPI is suitable for high-resolution work. Note: Some users may experience some discomfort when first using our trackball mouse. This is normal and requires familiarity with the new grip and position. We recommend allowing 1-2 weeks for adjustment. Many users find that once acclimated, the comfort and support significantly improve their overall experience.