VIITA Race HRV smartwatch monitors your hydration, stress and more €199 - Geeky Gadgets
VIITA Active HRV Tachymeter Black, Smartwatch Made of Exquisite Materials, up to 2 Weeks Battery Life, Equipped with GPS, Heart Rate Monitoring, Water Resistant up to 330ft/100m (Silicone Strap) : Amazon.com.au: Electronics