♛Why Ergonomic Vertical Mouse Most people get "mouse hand" after long time working with computer or laptop, that is due to frequently twist your forearm muscle with traditional mouse holding gesture. It is why Ergonomic Vertical mouse comes out. Comparing with traditional mouse, with ergonomic vertical design, ergonomic vertical mouse is more comfortable and friendly for human hand. It not only could reduce muscular strain, but also prevent the issue of "mouse hand" Find a better and hand-friendly way to use mouse Ergonomic Comfortable Grip Reduce your wrist or hand fatigue Stop twisting, releasing the pressure ♛More Natural Ergonomic design is not just for the structure, but for using habit. With special button layout design, thumb groove and rubber coating, let you more easy to use it and offer you comfortable and natural using experience. With removable palm rest With ergo button layout ♛Sensitive Sensor With sensitive sensor, it can be used on both rough and smooth surfaces. ♛ Specifications: Version: Wireless Button: 6 (Left click, Right click, Scroll wheel, Forward, Backward, DPI button) Resolution: 800/1000/1600 DPI Working Voltage: 5V Working current: ≤16mA Connection: With USB Nano Receiver Battery: 1*AA(5#) Battery (not included) Mouse Wight: 180g/ 6.35oz Mouse Dimension: 149(L)*95(W)*99(H) mm/ 5.87(L)*3.74(W)*3.90(H) inch Compatible System: Basic function is compatible with Windows XP, Vista, 7, 8, 10, Linux. ♛Box contains: 1 x M618Plus wireless mouse 1 x user manual