The 3M Ergonomic Vertical Stick Mouse is clinically proven to reduce muscle strain and discomfort associated with carpal tunnel syndrome and repetitive stress injury. Its unique design places your mousing hand, wrist and arm in a more ergonomic position compared to a standard mouse. Comes in two sizes for more comfortable mousing.

Features & Benefits:

• Unique vertical grip keeps hand and arm in a neutral position, reduces pressure on wrist's median nerve.
• Clinically proven to relieve muscle strain and discomfort due to carpal tunnel syndrome.
• Programmable third button.
• Optical tracking (no mouse ball)
• USB and PS/2 connectivity.

Size Specifications:

Small/Medium: Palm Width = 2.75 to 3.50 inches
Large: Palm Width = 3.50 to 4.0 inches +