Interesting new technology premiering. Let us introduce to you Kuai Multisport Biometric Headphones. kuai multipsort biometric headphones https://www.youtube.com/watch?v=JGs3hgVftKw ---------------------- PRE-ORDER NOW AT WWW.KUAIWEAR.COM ----------------------- Kuai has created the the world’s first wearable multi-sport coach, using technology covered by 30 patents and clinically validated by Duke University, the Kuai headphones accurately calculates the user’s heart rate, VO2max, calories, cadence, distance and pace, in land and water. These headphones are ideal for sport training as they offer the ability to create and download customizable training plans, create voice guided interval training p

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