Expert developed; Parent preferred. Activated by child's bite! Ideal for first teeth. Gentle vibrations & multi-textures offer relief for first teeth. 1. Ring handle is designed for two little hands to grasp. 2. Easy-spin rattle is fun for baby to play with. 3. Multi-textured tips offer a variety of comforting surfaces. Gentle vibrations begin instantly when child bites down on star points. Non-replaceable battery is sealed inside for safety. PVC-free. This product does not contain polyvinyl chloride or phthalates. Actual product styling and colors may differ from product description. Made in China to The First Years' quality specifications.