Input power two "AA" batteries(not included) Massager for head & joints(Elbow,Shoulder,Knee,Ankle) Increase blood circulation Relaxes stressed Muscles Helps relieve aches & pains Release your nervousness and tiredness and create relaxation Simple and safety operation Each leg can be gently bended in a semicircle shape Including control handle,ten stainless legs with special tips For a happy and healthy life CE approval