When working with a regular computer keyboard, the bones of the forearm are in an unnaturally crossed position, and after a short time pain and fatigue of the entire forearm occurs. Long-term use of such a keyboard can lead to chronic problems requiring medical attention.
Carpal tunnel syndrome - a modern health problem.
The use of common office keyboards and mice is also associated with a modern computer disease - the so-called carpal tunnel syndrome (so-called oppression syndrome or RSI). It is a compression of the median nerve in the carpal tunnel, which is located in the wrist of the hand. The median nerve passing through this tunnel transmits impulses from the brain to the thumb, index, middle finger and part of the ring finger. In healthy people who do not overload the wrist area, the carpal tunnel provides enough space for the passage of the median nerve, and the fingers are thus sufficiently supplied with impulses from the brain, so their full functionality and sensitivity is preserved.
The basic symptoms of this syndrome include tingling and pain in the first three fingers (thumb, forefinger and middle finger) reminiscent of the feeling of a hand lying down. There is also a weakened sensitivity of the hand, manifested by a reduced ability to press firmly and clumsiness of the hand in general (in the final stage leading to the falling of objects from the hand). Symptoms often manifest at rest and pain can extend to the forearms and shoulders. In the initial stage, the solution is simple - immediately stop using a regular computer mouse and practice your hand regularly. In the advanced stage, endoscopic surgery in the wrist is already necessary, when the carpal tunnel is relaxed, resp. increase its throughput. In the fully developed syndrome, it is necessary to cut the wrist ligaments, which relieves the pressure on the nerve.
According to the State Health Institute (SZÚ), it is the most common occupational disease in the Czech Republic, and the number of patients is increasing every year.
All these problems can be prevented very easily by using an ergonomic keyboard and a vertical mouse, where the user's hand and forearm are in a natural position and there is no unnatural crossing of tendons and bones or oppression of the median nerve in the wrist.
Classic keyboard layout
Long BACKSPACE key to the width of two standard keys
Long SHIFT key to the width of the two standard keys on either side of the keyboard
24 multimedia and function keys
Increased durability and longevity of keys
Increased durability of key prints when typing with long nails
Membrane technology resistant to dirt
USB 2.0 connector backward compatible with USB 1.1
Rubberized anti-slip front and back feet
Easy Plug & Play installation without the need to install and download drivers (just connect to the USB port of a computer or laptop)
Compatible with Windows and Mac OS X operating systems (product features not supported by Mac OS X may not work properly)
Cord Length: 150 cm
Input voltage: 5 V
Input current: 260 mA
Recommended maximum operating temperature range: 0 - 40 ° C
Dimensions (d × h × h): 485 × 255 × 45 mm
Weight including cable: 962 g