Do you experience discomfort in your neck, shoulders, or wrists when using a mouse for extended periods without an optimal angle? Are you concerned about wrist strain and fatigue? This vertical optical mouse is ergonomically designed to reduce wrist strain with a comfortable pinky finger and thumb rest, along with a fully contoured shape that seamlessly supports the palm, promoting a healthier and more efficient computing experience. Features: Ergonomic Design The elegant contoured shape provides seamless palm support, enabling smoother and more flexible movement. It helps reduce wrist tension and minimizes fatigue during prolonged use. Comfortable, supportive, and health-conscious design. Rapid Responsiveness Optical tracking technology delivers high sensitivity and precise cursor control. Switch between DPI levels (800, 1200, 1600) with a single button to adjust cursor speed based on your task and preference. Enhanced Functionality Equipped with forward and backward navigation buttons for faster web browsing, document handling, and improved workflow. Ideal for gaming, programming, office tasks, and general computer use. Convenient Wireless Connection 2.4GHz wireless technology ensures a fast, stable, and interference-free connection without the clutter of cables. Simply plug in the Nano receiver for immediate, reliable performance. Automatic Sleep Mode Automatically enters sleep mode after prolonged inactivity or power loss to conserve energy. Wake it instantly by pressing any button. Designed for energy efficiency and reliability. Specifications: Type: Left hand Material: ABS Color: Black Engine: Optical Number of Buttons: 5 Connection: Wireless Resolution: 800-1200-1600 DPI Power Supply: 2 AAA batteries (not included) Operating System Compatibility: Windows 10, Windows 8, Windows 7, Windows XP, Vista, ME, 2000, Mac OS, and other compatible operating systems Item Dimensions: 12.5 x 8.2 x 6.5 cm / 4.9 x 3.2 x 2.6 in (L x W x H) Item Weight: Approximately 108g / 3.8 oz Package Dimensions: 13 x 9.2 x 7.5 cm / 5.1 x 3.6 x 3 in (L x W x H) Package Weight: 142g / 5 oz Package Contents: 1 x Wireless Vertical Ergonomic Optical Mouse 1 x Nano Receiver (stored under the mouse) 1 x User Manual (English and Chinese)