http://www.macnn.com/articles/01/03/16/improvements.made/
Improvements made to head-controlled mouse
updated 05:15 pm EST, Fri March 16, 2001
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Gyration and Boost Technology have announced a newly-formed partnership to bring more advanced and empowering input devices to disabled computer users. As part of the partnership, Boost Technology's head-controlled mouse called the Tracer will incorporate Gyration's patented GyroPoint technology, "a unique method by which an inertial motion sensor detects natural movement to control a cursor on a remote display." The Tracer will also incorporate Gyration's radio frequency technology to avoid the line of sight difficulties with products that use infrared for communication. The Tracer is compatible with both Macs and PCs.
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Wow
time to say goodbye to expensive headmouse solutions!
Quite nice