Features: 1.3 Levels DPI: Wireless ericonomic mouse has 800DPI, 1600DPI, 2400DPI three gear can be adjusted for easy use. 2.Vertical Design: Wireless vertical mouse uses human engineering vertical design to relieve and prevent wrist tubular syndrome. 3.Wireless Connection: Ericonomic mouse uses 2.4GHz wireless connection, 10 meters distance, easy to use. 4.Precise Control: Vertical wireless mouse adopts optical laser technology to accurately control. 5.Durable Practical: 2.4GHz wireless mouse is easy to use, comfortable to hold, practical durability. specification:Item Type:Wireless Vertical Mouse Material: ABS Wireless: 2.4G Wireless Distance: 10 Meters DPI: 800dpi; 1600dpi; 2400dpi Button: 6 Keys Battery Type: 1 x AA Battery (not Included) PackageList:1 xWireless Vertical Mouse 1 x Receiver 1 x User Manual NoteDelivery without battery.