Made entirely from super-soft, medical-grade silicone, the ISSA™ baby is the perfect solution for your little ones' oral care needs. In Massage Mode, gentle sonic pulsations soothe teething irritation, even before your baby's first tooth, while Brush Mode keeps baby teeth clean and healthy. The extremely secure design, with no moving parts or sharp edges, makes it extremely safe for small mouths, so you don't have to worry about damage to soft tooth enamel or gum tissue. The Gum Massage Mode soothes the pain of teething. The Brush Mode gently cleanses sensitive primary teeth. The Smiling and Sad Smile Helpers make brushing your teeth fun and interesting. Ultra-safe, non-removable brush head. No sharp edges. Up to 480 uses per USB charge.