Fridge Phonics is an educational toy designed for use by children with cognitive or communication disabilities. To use, place the letter in the magnetic letter reader and push the letter to hear its name and sound through a fun phonics song. The magnetic letter reader attaches securely to a refrigerator or other metal base. POWER: Uses three triple-A batteries. DIMENSIONS (LxWxH): 5 x 4 x 1.5 inches.