Feature: 1. Vertical Ergonomic Design: Ease wrist pain which is caused by long-time mouse using. Your hand with the arm keeps straight and placed naturally when you use a vertical mouse. 2. High precision control: non-delay technology allows high sensitivity, provides up 800/ 1200/ 1600 3 levels of adjustable DPI, you can make it more precise for things, like color correcting and photo editing, or faster for browsing. 3. Smooth and natural feeling: made of material feels like human skin, gives users the most comfortable hands feeling and avoids from sweat and slipping. 4. Long Time Use: power supply by 2pcs AAA battery, low power consumption, ON/OFF button for easy switch. 5. 2.4GHz Wireless Control: no messy wire, wireless transmission can operate up to 10 meters. Specification: Vertical Ergonomic Design: Ease wrist pain which is caused by long-time mouse using. Your hand with the arm keeps straight and placed naturally when you use a vertical mouse. High precision control: non-delay technology allows high sensitivity, provides up 800/ 1200/ 1600 3 levels of adjustable DPI, you can make it more precise for things, like color correcting and photo editing, or faster for browsing. Smooth and natural feeling: made of material feels like human skin, gives users the most comfortable hands feeling and avoids from sweat and slipping. Long Time Use: power supply by 2pcs AAA battery, low power consumption, ON/OFF button for easy switch. 2.4GHz Wireless Control: no messy wire, wireless transmission can operate up to 10 meters. Compact and portable: light, simple and modern design, easy to carry, suitable for game, home, office, net bar, etc. Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.