Withings Steel HR, reviewed: heart rate hiding in an everyday watch - CNET
Nokia Steel HR review - Mirror Online
Review: Withings/Nokia Health Steel HR Smartwatch
Nokia - Did you know the Withings Steel HR has some serious endurance? It has the longest battery life of any HR tracker on the market -- 25 days on a single
Amazon.com: Withings Steel HR Sport Hybrid Smartwatch (40mm) - Activity, Sleep, Fitness and Heart Rate Tracker with Connected GPS, Smart Notifications, Water Resistant with 25-Day Battery Life : Electronics
Review: The Nokia Steel HR Hybrid Smartwatch - Gear Patrol