NOTE:Due to the innovative design of this ergonomic mouse, you may initially find it difficult to use. Please continue use over several days to grow accustomed to and enjoy the full comfort of the design. If you have any question or problem, please contact with us, we will try our best to help you.The ergonomic vertical mouse is a perfect choice for people who working long periods on computer every day, but NOT suitable for gaming which needs high precision control.Specification:Material: ABSSize: 142*101*83mmWeight: 225±10gDPI: 800-1600-2400-4000ACC:10GAngle Adjustable: From 53° to 73°Button Lifetime: 10 millionBattery: 800 mAhWorking voltage: 5VWorking current: ?500mAReport rate: 500HzCable: 1.4m Type-CConnection: BT3.0 / BT4.0 / 2.4GhzButton supports: Windows XP /7/8/10/Mac (For mac OS: Long press forward or backward button for 3 seconds can change to full screen page turning ( Forward and backward ) function)Drive Compatible: Windows 7/8/10. NOTE: Apple computers (Mac OS) do not support the mouse's customized (programmable) function, but the normal function can still be used in the Apple computers or Mac OS.Package Included:1 * Wireless Vertical Mouse1 * USB Receiver1 * USB Cable 1 * User Manual