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.