HART X2 Smart Ring, Fitness & Health Tracker, Gunmetal Black, Size 9 | Buy Sizing Kit First. 8+ days of Battery life. Track sleep, heart rate, HRV, stress, blood oxygen, steps and calories.

From the brand

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 colours—Gunmetal 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 X2’s charging case can recharge your smart ring up to 5 times, ensuring continuous fitness tracking.
Sleep Score: Track your sleep stages—Deep 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 body’s resilience for smarter workout and rest decisions.