What it is: A waterproof, solar-powered, and supremely durable ReFa facial roller, coated with platinum for an irritation-free experience What it does: Replicates a massage-quality, deep-kneading technique that helps reduce visible puffiness and promotes a rejuvenated appearance How to use: Firmly grip the thicker part of the handle without covering the solar panel with your hand. Roll in both directions along the lines of your face and décolletage, pulling up the areas where the skin is soft Do not place or store the roller device in the freezer or refrigerator. Doing so may cause damage to the rollers or result in injury to the skin 1-year manufacturer warranty Imported, Japan Measurements Width: 3.5in / 9cm Length: 6.25in / 16cm