Hair goes high tech

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The Hair Coach from L’Oreal’s Kerastase brand uses a microphone, gyroscope and other sensors to monitor how fast and how hard you’re brushing.

(AP Photo/John Locher)
(AP Photo/John Locher)

An accompanying app recommends how to brush for optimal quality and minimal breakage and split ends. It can also factor in heat and humidity and even discern if hair is wet or dry.

Kerastase teamed up with tech company Withings on the battery-powered brush, due out in mid-2017. It comes at a hair-raising price: $200.