Oral-B Chip 4 4500 Black Electric Toothbrush by Braun. The brands Oral-B SMART 4 installation experience is the first to come with an accompanying rechargeable toothbrush. The slim handle 4 SMART 4500 improves your electric toothbrush brushing habits. It allows seamless connection to the Oral-B app on your phone and guides you to better brushing with real-time feedback. They improve your cleaning routine and the unique Oral-B round head does the rest. It removes up to 100% more plaque than a normal manual toothbrush for healthy gums and brings your whiter smile from the first poetsday removed by surface stains. Thats not all. The toothbrush also protects your sensitive gums by brushing the pressure sensor that lowers the polishing speed and notifies you if you brush too hard. Coaching can improve your smart brushing habits and your oral health. No wonder Oral-B is the number 1 recommended by dentists around the world. Fits the following replacement brushes: Action Cross, 3D White, Ultra Thin Sensi, Clean Sensitive, Clean Precision, Floss Action, Tri Zone, Dual Clean, Power Tip, Ortho Care.