Maintain oral hygiene with Oral-B 4500 Cross Action Power Tooth Brush. The brush helps you get cleaner, whiter teeth and healthier gums. It has a round head that contours to each tooth for cleaner teeth. The brush features a pro-timer, visible pressure sensor, and Bluetooth features that connect it to the Smart Coaching App. The visible pressure sensor alerts you if you brush too hard. It has three brushing modes. It has a Li-ion battery that lasts up to two weeks. The brush comes with a travel case.