Fangrui Product Details 1. Ergonomic Design:the Vertical Mouse Keeps Your Wrist In A Natural Grip, Which Reduces Wrist Wear And Tear, Relieves Wrist Fatigue, Allows You To Maintain A Relaxed And Comfortable Arm Posture, And Improves Office Efficiency 2. 3 Levels Of Dpi Adjustment:the Mouse Has 3 Adjustable Dpi Settings Of 800, 1200, And 1600, Allowing You To Customize Your Mouse Speed And Accuracy,meet The Mouse Precision Requirements Of Different Screens And Scenes 3. Wireless Freedom, Long Battery Life: The Vertical Ergonomic Mouse Adopts Advanced 2.4g Usb Transmission Technology, Plug And Play, Allowing You To Enjoy The Freedom Of Wireless Operation. It Can Be Via The Included Cable, And The Environmentally Friendly Rechargeable Battery Can Be Used For Up To 30 Days On A Single Charge. 4. 6 Buttons:the Left And Right Buttons Are Designed To Be Silent, So You Don Have To Worry About Disturbing Others When Using It In The Office, Dormitory Or Library Tips:it Takes About A Week To Get Used To The New Grip For The First Time. T