The thumb keypad
Includes:: often used keys such as Enter, Space, Backspace, Delete & the combination keys, Control & Alt on the PC. This redistributes the workload from your relatively weaker & overused little fingers to stronger thumbs. This separation minimizes strain & stretching by positioning your arms Approx. at shoulder width & with wrists straight. This design reduces abduction & ulnar deviation (common symptoms experienced with repetitive strain injuries such as carpal tunnel syndrome & tendonitis).