The Lomak (Light Operated Mouse And Keyboard) is a modified keyboard designed for use by people who have difficulty using or are unable to use a standard mouse and keyboard, including people with upper extremity disabilities, neurological disabilities, arthritis, cerebral palsy, multiple sclerosis, muscular dystrophy and carpal tunnel syndrome. The Lomak’s keys are arranged in three circles with each key equidistant from the confirm key so that the keyboard can be operated with very small movements. There are 105 keys, 87 keyboard buttons and 18 mouse control buttons. Each key or mouse function must be confirmed before that keystroke is sent to the computer in order to reduce the chance of accidental inputs and the error rate and to improve overall speed. The Lomak can be operated by hand or using an infrared head pointer (included). COMPATIBILITY: For use on IBM and compatible computers or Apple Macintosh computers. SYSTEM REQUIREMENTS: Windows 98 or MacOS; the keyboard connects through a USB port. POWER: The Lomak keyboard ues the USB connection; the head pointer is a class 1 laser that uses rechargeable lithium-polymer batteries (a charger is included). DIMENSIONS (HxLxW): The keyboard is 30 x 390 x 215 millimeters (mm); the head pointer (without headband) is 15 x 67 x 33 mm. WARRANTY: 1-year limited warranty.