In space, it's difficult to get a dentist appointment, which is why future astronauts need to take extra good care of their teeth. With the Jett the Rocket toothbrush, starting is a breeze. The blinking lights and the two-minute countdown, along with the two-stage flossing brush, ensure peak performance and make every tooth brushing mission a success. With its small brush head and lightweight handle, this toothbrush is perfect for making your child's brushing routine unique. The DeepClean bristles are especially suitable for mixed teeth. The shorter bristles clean the tooth surface, while the longer bristles clean between the teeth. The toothbrush operates with a AAA alkaline battery, which is included (please use only alkaline batteries). Vibration frequency: 15,000-25,000 vibrations per minute.