Description: Ergonomic Design: Our wireless vertical mouse is designed with a palm rest and thumb rest to provide better support and keep your hands in their natural position effectively reducing wrist strain. Adjustable DPI: Our ergonomic vertical mouse has adjustable DPI which allows you to change the sensitivity of mouse pointer speed (800dpi; 1600dpi; 2400dpi) for use in various scenarios. Side Buttons Design: Our vertical wireless gaming mouse uses a side buttons design which can ensure noise-free clicks so you can focus on your work without disturbing others. Stylish and Wireless Design: Our vertical ergonomic wireless mouse has a sleek and beautiful look. It connects wirelessly and requires no extra cables. Great Compatibility: Our wireless ergonomic mouse is compatible with laptops desktops or any device with a USB port just plug in the USB receiver plug in and play. Specification: Name: Ergonomic Vertical Mouse Resolution: 800dpi; 1600dpi; 2400dpi. Buttons: 6 buttons Maximum working range: about 10m/32.8ft Available Colors: Black/Grey Material: ABS Button life: 5 million times Power supply: 1 AA 1.5V battery (not included in the package) Voltage/Current: 1.5V/8mA Mouse size: about 4.0*2.6*2.9in/10*6.6*7.4cm Notes: 1. Due to the different display and lighting effects the actual color of the product may be slightly different from the color shown in the picture. 2. Due to manual measurement please allow a measurement deviation of 1-3cm. How to Use: 1. First open the back cover of the mouse take out the USB receiver and insert it into the USB port of the computer. 2. Then install the AA battery turn on the power switch and you can use it. includes: 1*Mouse 1*Instruction 1*USB Receiver