Hand tremor . The shape and size of the handset are very important factors. People with arthritis, uncoordinated movement or reduced strength may find it difficult to handle and hold the handset if the shape is too round and smooth or if it is too wide or too small. Consideration should also be given to the functional shape of the handset when it is being held to the ear by a person with reduced coordination or weak grip. See also Handset - easy grip .
Telephone features that make a difference .