This trimmer is perfect for beard. Gives beard of size 1mm-10mm by the rotation of blue adjuster. But this trimmer cannot be used head hair. Battery life is 45 minutes that to after a long charge of 10 hours. Can trim underarm . Easy to clean(by remving the above layer) or can be washed with water . The reason this trimmer cannot be used for head hair is:the head hairs are thick and the battery gets low very quickly and cannot trim hair.Ok for brard but besr to buy big size for head trimming.