PERIMICE-517 Wired Ergonomic Vertical Trackball Mouse with Silent Click Connection type:USB Type-A Easy setup allows for immediate

Easy setup allows for immediate deployment so you can get started right away

Build-in 10 multimedia hotkeys with control of Video

Built-in two-level DPI

ERGO COMPACT DESKTOP SET -A value compact desktop set with ergonomic design

PERIMICE-517 Wired Ergonomic Vertical Trackball Mouse with Silent Click Connection type:USB Type-A Easy setup allows for immediate7 Button Ergo Mouse Wired ergonomic trackball mouse with quiet clicks (left right backward forward DPI switches) and they work with the trackball simultaneously. Easy to switch the cursor speed with DPI switch buttons (resolution 400 1000) Natural Ergo Design The ergonomic trackball mouse is for right handed users; recommended to repetitive strain injuries RSI users and the users work particularly long periods on the computer. For example, office