Key Specifications • Weight: 2.4 to 3.6 grams (depending on the ring size) • Material: Fighter jet-grade titanium outer shell with a tungsten carbide carbon coating and a medical-grade hypoallergenic epoxy resin interior • Battery Life: 4 to 6 days on a full charge (takes about 180 minutes to charge from 0% to 100%) • Water Resistance: Up to 100 meters (10ATM), making it safe for swimming and showering • Connectivity: Bluetooth Low Energy (BLE5) compatible with iOS and Android • Colors: Matte Grey Core Features • Health & Vitals Tracking: Monitors 24/7 heart rate variability (HRV), resting heart rate, skin temperature, and blood oxygen saturation (SpO2) via infrared, red, and green LEDs. • Sleep & Recovery: Tracks sleep stages, naps, movement, and circadian rhythm to calculate daily sleep and dynamic recovery scores. • Additional Insights: Provides stress rhythm tracking, movement indexes, and lifestyle guidelines such as personalized caffeine windows.