The Oral-B iO 10 electric toothbrushes are the most expansive iO models. They have the most brushing modes: 7. The iO 10 toothbrushes also have an interactive charging dock. The charging dock gives feedback on your brushing behavior while you brush. Thanks to the 3D, you can see if you're brushing each tooth good enough in the app. These toothbrushes also include a rechargeable travel pouch. That way, you can also charge your toothbrush on the go.