Left Fifty Ergonomic Vertical Mouse Designed specifically for left-handed users, the Left Fifty Ergonomic Vertical Mouse optimizes wrist and arm positioning to minimize strain and enhance comfort during extended computer use. This mouse is ideal for those recovering from repetitive strain injuries (RSI) or anyone who spends long hours working on a computer. Key Features: - Ergonomic Design: Promotes a natural hand position, reducing the risk of discomfort and injuries associated with prolonged use. - DPI Settings: Offers three adjustable DPI levels (800/1200/1600), catering to both everyday tasks and gaming needs with improved reaction times and accuracy. - Sleep Mode: Automatically enters sleep mode after 8 minutes of inactivity, conserving battery life. Easily wakes up by pressing any button. - Universal Compatibility: Works seamlessly with Windows 7, 8, 10, XP, 2000, CE, Vista, and Linux. (Note: Not compatible with Mac OS) - Compact Size: Measures 5.0 x 3.0 x 2.5 inches, making it portable and easy to handle. Usage Scenarios: - Office Use: Ideal for professionals who spend long hours at their desk, providing comfort and reducing fatigue. - Gaming: Suitable for gamers seeking precision and responsiveness during gameplay. - Home Computing: Perfect for casual users looking for a comfortable alternative to traditional mice. Note: Requires 2 AAA batteries (not included). The USB receiver is conveniently packaged in a small transparent bag within the box.