Patented sonic technology is 75% more effective than manual toothbrushes in hard to reach areas. The KidTimer gradually increase to two minutes to help train kids to brush the recommended time, and KidPacer musically alerts when to move to the next quadrant of the mouth to ensure a thorough cleaning.Keep kids engaged while they learn to brush. The Philips Sonicare For Kids Bluetooth enabled toothbrush interacts with a fun app that helps kids brush better.