Wireless ergonomic trackball mouse with 2.4 GHz connection, 5 programmable buttons, and easy to switch the cursor speed with DPI switch buttons Natural ergonomic with right-handed design; recommended to repetitive strain injuries RSI users and the users work Particularly long periods on the computer Personalize your working environment with the programmable feature; you can download software by visiting Perixx website Auto power-saving feature; mouse automatically enters power-saving mode After 10 seconds of being sleeping mode, 8-10 minutes of being standby mode System requirements: Windows 7/8/10, a USB port; package includes Perixx 12-month limited warranty Note: In case of Wireless mouse, the USB receiver will be provided inside or along with the mouse Product Dimension: 5.12 x 4.21 x 1.77 inches