Features: 1.Ergonomic Design: This vertical mouse features ergonomic design which reduces muscle strain, wrist pain, fits your palm and keeps your hand and arm in a more comfortable position. 2.Nonslip Scroll Wheel: This ergonomic wireless mouse is designed with 3D nonslip scroll wheel, more comfortable and more sensitive. 3.Plug and Play: This ergo mouse has inbuilt 500mAh battery, comes with USB charging cable and USB receiver. Plug and play without delay. 2.4G wireless technology supports up to 33ft transmission. 4.Adjustable DPI: This ergonomic mouse supports 800/1200/1600 DPI adjustment with optical tracking technology, available on resin, leather, cloth, paper, wood and other different types of surfaces. 5.Breathing Light: This wireless mouse adopts breathing light design. Ideal and practical gift for game players and people who work in front of computer. specification:Item Type: Vertical Mouse Material: ABS, Rubber Battery Model: 602040 Rechargeable Polymer Lithium Battery x 1 (Inbuilt Battery Included) Battery Capacity: 500mAh Key Number: 6 Keys DPI: 800/1200/1600 Wireless Transmission Frequency: 2.4GHz Interface: USB Adjustable DPI: 800/1200/1600 Wheel Direction: Up and Down Working Mode: Photoelectric Operating Distance: Approx. 10 Meters / 33ft Product Size: Approx. 123 x 63 x 75mm / 4.8 x 2.5 x 3.0in ( Manual Measurement, Slight Error May Exist ) PackageList:1 x Vertical Mouse 1 x USB Cable 1 x USB Receiver 1 x User Manual