They Relieve stress and feel great. Lightweight manual massager, ideal for health care. The massage tips are made of solid synthetic resin which bonds exceptionally well to the stainless steel wire and is very smooth textured. Easy to use this lightweight scalp massager titillates nerve endings in the scalp as you hold the handle above your head and allow the smooth resin tips of the multi-length wire fingers to delicately pass over your scalp. The relaxing and tingling effect transcends from the head to lower limbs and extremities creating a holistic sensation. No batteries are required – this is a manual massager.