Make brushing fun with Infinity Kids Power Toothbrush with EasyFlex Sensitive Bacteria Defense Brush Heads. This battery powered kids toothbrush features extra soft Bacteria Defense bristles that provide effective yet gentle cleaning and help keep the brush clean for up to 3 months. Replace-Me Bristles fade with use to remind user to replace brush head. Includes 1 AA battery. For optimal hygiene dentists recommend replacing your toothbrush every 3 months.