ARM PROTECTION: The ergonomic vertical mouse allows you to adjust your arm and wrist to a comfortable position, reducing arm muscle tension for more comfortable movement and less stress. | PRECISE CONTROL: The ergonomic mouse uses an optical sensor with 4800/3200/2400/1600/800 DPI, providing higher sensitivity than standard optical mice, allowing smooth and precise tracking on a variety of surfaces. | QUIET DESIGN: Say goodbye to loud clicking sounds and welcome to a quieter environment. The vertical wireless mouse adopts a silent clicking design, and the clicking noise is reduced by more than 90%, thereby avoiding disturbing others and ensuring that your work or study will not be interrupted. | RECOMMENDED BUTTONS: The forward/back buttons of the carpal tunnel mouse will help you greatly improve your work efficiency when browsing websites/reading emails, which is very suitable for web surfers, gamers and people who work long hours (Note: The side buttons are not suitable for Mac or IOS systems) | ENERGY SAVING: The laptop wireless mouse enters sleep mode (completely cuts off power) after 8 minutes of inactivity, press the left or right button to wake it up. Note: We recommend using branded batteries to ensure the working life of the mouse. When the battery is low, an LED light will flash. (2 X AAA batteries not included) | WORRY-FREE-DESIGN: The computer mouse is compatible with Windows 11/10/8/7/XP/Vista and Mac OS/Linux, just plug in the receiver to use the mouse, the connection distance is 15 meters. In addition, when the battery is low, the LED light will flash to remind you to replace the battery. | 36-MONTHS WARRANTY: If you encounter any problems when using the TECKNET vertical mouse, please feel free to contact our professional customer service team and enjoy the TECKNET 36-month warranty (registration only)