Colgate Hum Review: A Smart Toothbrush That Nails App-Guided Brushing | WIRED
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Colgate's new smart toothbrush is exclusive to Apple Stores - The Verge
Colgate E1 toothbrush review: The app-enabled, smart electric brush for kids and adults | The Independent
Get two Colgate smart electric toothbrushes for $30 today | Digital Trends
Smart Toothbrushes Tell You Everything You're Doing Wrong - WSJ