ULTRAHUMAN Ring AIR Smart - Sleep, HRV & Stress, No Subscription

Lightweight, robust and waterproof: at only 2.4 g and 2.4 mm, one of the lightest smart rings in the world. Made of durable aviation grade titanium with skin-friendly hypoallergenic inner material. Waterproof up to 100 m (IP68) - swim, shower and train without worry. So light that you hardly feel it day and night. ACTIVITY, SLEEP TRACKER & RECREATION: Keep track of sleep phases, activity and your daily rest – all right from the finger. The fitness ring measures heart rate, HRV, skin temperature, stress and blood oxygen and translates everything into clear, daily recommendations. So you always know when to go full throttle and when to switch back a gear. All in one ring: heart rate monitor, pedometer, activity, health and sleep tracker - bundled into a single, elegant fitness ring. Over 20 training modes accompany you in every session, from workout to everyday life. The sports ring that replaces your fitness watch and barely noticeable. No subscription – easy to get started: All important functions are free, without any hidden costs or subscription. Up to 6 days of battery life on one charge and compatible with iOS and Android. Available in 15+ languages, 6 colours and 10 sizes (5-14). Note: Please order the size kit first because our smart ring sizes are different from standard ring sizes. Also supports women's health: track cycle, ovulation and pregnancy with multi-biomarker precision. The fitness ring for women predicts your fertile window and reliably determines your ovulation. The unique pregnancy mode provides trimester-specific insights and accompanies you in every phase of life.