4D Roller Body Massager will help tone your body lasting up to 5-8 hours. Inspired by the kneading techniques of professional aestheticians this four roller design imitates the motion of manual lymphatic drainage kneading firmly while rolling gently to make your body skin firmer. Spa Grade Massage - with its new kneading technology it relieves sensitive skin promotes face-lift tightens body skin shapes up your body improves blood circulation and alleviates tension Body Cells Activator - it produces micro current to activate cells and promotes the metabolism of skin 360 Roller Control - this beauty tool is designed in multiple dimensions to handle different angle of your face and body. Waterproof Roller - this beauty tool is submersible in water and can be used during the shower. Safety First Tool - this roller is eco-friendly and harmless to any skin type