Feature: 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 ). Package List: 1 x Vertical Mouse1 x USB Cable1 x USB Receiver1 x User Manual