The Contour Design RollerMouse Red Plus is the latest generation of the proven Rollermouse family, which all use a central pointing device which uses a rollerbar instead of a traditional mouse and are positioned between the user and their keyboard or laptop. This allows the user to avoid the 'reach' for the mouse, and move their cursor and click in the space between themselves and their keyboard. This model differs from the RollerMouse Red in that it has an extra deep palm support (5.12" vs 2.87" on the Red) which affords individuals with very large hands more appropriate support. It also includes hardware which will allow the product to mount onto trays which already have pre-drilled holes (assuming the hole patterns match). The four main improvements of the Red family over previous generations include a sleek aluminum housing which is sturdy, a newly redesigned rollerbar with added thickness and texture and a completely different tracking technology from that used in previous models and a new 'virtual' click mechanism to replace the previous mechanical mechanism. The design is ambidextrous, as the 7" bar can move along the entire 16" width of the device. The cursor is moved by rolling a 'dowel' or cylinder-shaped bar with the fingertips to achieve 'up' and 'down' movement, and sliding this bar from side to side for horizontal movement. Pressing down on the bar will create a left click action. Eight buttons and a scroll wheel are located below the bar to generate left/middle/right/double clicks, copy, paste and vertical scrolling. There is also a DPI adjustment to toggle from 800 to 2400 dpi to allow the user to select their preferred cursor speed.