The Ryze Element Smart Ring is an ultra-thin (2.5mm) wearable that delivers continuous biometric and activity insights in a lightweight nano-ceramic and stainless steel design. Track heart rate, blood oxygen, skin temperature, sleep, steps, distance, calories, menstrual cycle and recovery reports, with 7-day offline data storage. Smart touch controls let you control music, camera and e-books, plus an SOS emergency trigger via your connected smartphone. Water resistant to 5 ATM, dust- and sweat-resistant, ring battery lasts 4–6 days (typical) or up to 20 days standby, and the quick-charge protective case holds up to 180 days of power and can recharge the ring multiple times. Compatible with iOS and Android devices; size 12 inner circumference 22mm, weight 7g. Measuring tips: measure at afternoon warmth and try the index finger for optimal fit and usability.