This Wireless Vertical Mouse adopts 2.4G wireless technology which ensures stable connection and offers 3 DPI levels for choice --- 800, 1600, 2400. What's more, with vertical design, it relieves wrist fatigue to some extent. 2.4G Wireless Technology: It ensures the stable connection and free you from the twisting cables3 Adjustable DPI Levels: There are 3 DPI levels --- 800, 1600, 2400. Free to switch. It offers you a pleasant sensation of higher speed, less delay and more correct locationErgonomic Vertical Design: Compared with traditional mouse, the vertical design relieves the fatigue of your wrist, and offers you comfortable feeling for touchPlug and play: No drivers required, just plug USB receiver into USB port of the device, easy to useLong Working Time: With built-in large-capacity battery, you can use it for a long time. And it is rechargeable, no need to change battery repeatedly Specification: Button: Left, Right, Scroll wheel, Forward, Backward, DPI buttonsDPI level: 800/ 1600/ 2400Battery capacity: 1000mAhAuto sleep mode: SupportSupporting system: Compatible with Mac OS/ Windows XP/ Win 7/ Win8/ 10Material: ABS Package included: 1 x Wireless Vertical Mouse 1 x Charging Cable 1 x USB Receiver