Athletes wanting to recover after exercise. It is a small massage tool that you can take anywhere. Soothing Effect: Gentle vibration massage. 3 massage heads. Versatility: Small and light. Can be carried anywhere. Easy to use: Gently pressing the top of the product will switch it on. Batteries: Batteries not included. Works with 3 AAA batteries. Storage Advice: Store in a dry place. Restriction of use: Keep away from water, oil, cream and gel. Composition: Main fabric- 80.0% Polycarbonate – Acrylonitrile Butadiene Styrene (PC-ABS), 20.0% Rubber – Synthetic, Inner fabric- 100.0% Printed Circuit Board.