Find Your Perfect Fit: Choose the right size with the FITTR HART X2 Smart Ring. Start by purchasing a sizing kit, wear it for 24 hours, and pick your size from 6-13. Available in 3 stylish coloursGunmetal Black, Sterling Gold, and Silver. Smart ring for men and smart ring for women.- New-Age Charging Case: Charge once, stay powered for up to 20 days. The FITTR HART X2s charging case can recharge your smart ring up to 5 times, ensuring continuous fitness tracking.- Sleep Score: Track your sleep stagesDeep Sleep, REM, Light Sleep, and Awake. The smart ring provides insights into your total sleep duration, heart rate, and restfulness for improved sleep quality.- Recovery Score: Get personalized recovery insights by tracking HRV, Sleep, and Resting Heart Rate (RHR), helping you optimize rest and improve overall health.- Heart Rate Variability (HRV): Monitor how your body handles stress and recovers with continuous HRV tracking. Understand your bodys resilience for smarter workout and rest decisions.