Evoluent VM2RBP Vertical Right Hand Mouse 2 - Black and Purple 5 programmable buttons each with different functions in different applications Speed toggle - Cycle among up to 3 pointer speed settings by keyboard shortcut or mouse button Auto click - Automatically perform a single or double click by pausing the pointer. Click lock - Press and hold a button momentarily to simulate continued pressing without holding down the button Break Reminder - Visual and/or audio alerts to remind you to take a break