This smart brush tells you if your hair is healthy The Kérastase Hair Coach is a hairbrush that connects to an app on your phone. Facebook Prev Article Next Article Gadgets Checkout these cool gadgets... Related Posts 3D Crime Scene Scanner Burton’s Hydrogen Reactor Can Power Your Phone x 6 Zenview 6 x 24' panels Motorized suitcase lets you ride to your gate like a boss There’s a Vacuum for Dog Poop Called Pooper Scooper Pong Clock On Sale Again