The trimmer should be comfortable to operate for both left-handed and right-handed people, from a standing position and without the need for bending or stretching. Very little physical effort should be required to operate it. Since the trimmer is aimed at middle-aged and retired people, who may have back problems, this is important.
The hand grip should be comfortable to hold in the temperature range specified in "Environment."
The trimmer will be adjustable for comfortable use by people of 5ft. 2in. (min) and 6ft. 2in. (max). They must be able to carry the trimmer the length of the garden.
Guide