The iClever wireless vertical mouse is the evolution of the computer mouse thanks to the following distinct features: 1. Encourages Natural Hand Positioning The well-thought out design of the ergonomic wireless mouse integrates the best in comfort, fluid motion and performance. Bringing your hand back to a more natural handshake position, the easily accessible buttons reduce unnecessary strain on your fingers and wrist. 2. Reduced Short-Term Fatigue Carpal tunnel syndrome is something we'd all like to avoid, which is why we've integrated a handy thumb rest and optimized contours to reduce hand fatigue. This special positioning alleviates unhealthy pressure from poor hand positioning of traditional mouse products. 3. Eliminate Health Risks There's nothing worse than ending each day with a sore wrist that never gets better. If you're someone who suffers from carpal tunnel syndrome due to excessive mouse usage, you can reduce or even eliminate pain completely with this ergonomic mouse! 4. The Best in Comfort and Performance No matter how many times you click a day, the rugged construction and quality materials have withstood intense testing up to 5,000,000 clicks. Your hand will feel right at home with the pleasing contours and metal scroll wheel, which always operates quietly. Suitable for a variety of surfaces, the precision cursor's variable settings extend to 2400 DPI, keeping your motions smooth and on track for any task. Note: You can click any button to wake it up from sleep mode.