Our vibrating teether really works. From Boston"s Children"s Hospital...to you! Soft and multi-textured, this vibrating teether delivers the gentle gum massage recommended by pediatricians. The sealed internal battery lasts 8 consecutive hours - enough to see you through your tot"s teething. Colors may vary. For ages 6 months and up. Gentle vibrations begin instantly when child bites down on star points Multi-textured tips offer a variety of comforting surfaces Non-replaceable battery is sealed inside for safety Lightweight so it"s easy for baby to hold Ring handle is designed for two little hands to grasp Easy spin rattle is fun for baby to play with Teether: 5 1/2"L x 3"W x 1/2"H BPA Free