The use of any keyboard may cause repetitive strain injuries to the hands, wrists, arms, neck or back. The risks of injuries can be reduced by taking frequent, short breaks to get up and walk around, a couple of times every hour. Users should also vary tasks throughout the day, to avoid overuse of the hands and wrists. When using a keyboard, a person should keep the shoulders relaxed with the elbows at the side, with the keyboard and mouse positioned so that they are comfortable to use. The chair height and keyboard should be adjusted so that the wrists are straight, and not resting on sharp edges of tables or the computers themselves. Some technology ranging from special keyboards to pen-tablet interfaces or speech recognition software can reduce the risk of injury. Pause software reminds the user to pause frequently.