Oral-B iO 8 vs iO 9: Which toothbrush is better?
According to various test reports, Oral-B electric toothbrushes offer excellent cleaning performance and come equipped with numerous features: In addition to a large, colorful display, the toothbrushes include pressure control, various brushing modes, Bluetooth for the app, and a magnetic charging station. But what are the exact differences between the current model “Series 9” and …