This height adjustable desk has two levels that can be combined to make a flat surface or split to make upper and lower level tiers using a hand crank. Both levels can be raised or lowered. Newer models of this desk come with an electric motor to adjust the height of the levels.

Both levels of this desk from PC Furniture Inc are adjustable for height using a built-in crank. The bottom is unobstructed making it a good choice for use with a wheelchair and it can be raised for comfortable use by people who are standing.

Many varities of this type of desk are available from other companies, like AD-AS.com. Other sources can be found using abledata.com.

Other equipment in the photo:

• Desktop Video Magnifier - set the desired size magnification and read books, documents, food labels, presciption labels, small items of all kinds and anything else you need to view close up.
• Adjustable Split Keyboard - this computer keyboard can be adjusted to a number of flat or raised positions to serve the needs of a wide universe of users.
• Foot Control Mouse - Press buttons on the desktop unit to assign Left/Right, Up/Down, & Diagonal directions and use pressure on the foot pedal to move the mouse.