Kensington Adjustable Memory Foam Extended Keyboard Platform with SmartFit System and Document Holder (K62684US) Reduces reach and provides a natural progression from keyboard to mouse - Non-skid base keeps pad secure. Hypoallergenic memory foam wrist rest provides 2 built-in height options (1-1/8" and 1-1/2") to ensure optimal typing angle. Frame structure offers stability and durability - Ideal for corner workspaces -- extends desktop to make room for wrist support. Indicates the correct distance for your personal comfort color, according to SmartFit(TM) guidelines. Built-in copyholder positions documents in line with the keyboard and monitor for faster and more comfortable data entry.