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
Withings Steel HR Sport Review: Analog Style With A Smart Heart - SlashGear
Withings Steel HR Sport Review | Digital Trends
User manual Withings Steel HR (English - 52 pages)
Withings Steel HR review (hands-on): The heart-rate watch with month-long battery life