Philips' first smart toothbrush now on sale in US and Europe

Philips' Next-Generation DiamondClean 9900 Prestige is now on sale in the US and Europe. It is the company's first electric toothbrush with built-in smarts that work without the internet. Its third-generation SenseIQ senses how you brush to adjust vibrations, and shows on a screen on the brush which teeth you have covered as you brush.