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 20 Amazing Products That Don’t Exist Yet Future Of Dumbbells Electric Surfboard – Rides Even on Flat Lakes, No Wind, No Wave 10 Best Gadgets for Dogs Greyp G12S Electric Bicycle Has Futuristic Touchscreen Controls, Can Hit 43.5MPH Official Microsoft Origami Video