The device has two components, 1 headpiece and 1 belt. The headpiece requires that you to put it across your forehead and back of head. We advise to wear a high ponytail / bun or have your hair loose. If you are wearing makeup it may smudge your forehead slightly. Both devices can be placed over clothing or directly on skin. We reccomend to avoid wearing black clothing as this interferes with the light waves.