[Sleep Skin Temperature] POBOVi Ring OnePlus has added the new sleep skin temperature monitoring technology, which significantly improves the accuracy of the monitoring data, which is a key technological breakthrough in POBOVi Ring's evolution from “health record” to “health prevention” [Size First Before You Buy] POBOVi Ring OnePlus size different from standard ring sizes. Purchase POBOVi Sizing Kit to find the most accurate and comfortable size for your finger [Physical Indicators Tracker] As an innovator in the wearable field, the POBOVi Smart Ring achieves the perfect combination of a compact design and multifunctionality. It includes stress, heart rate, blood oxygen, HRV and activity metrics, aiming to create an all-day personal health companion—truly bringing "Health at Your Fingertips" [No Subscription Fees] The POBOVi Ring redefines the essence of smart wearable devices. After purchase, you gain lifetime free access with full functionality—no hidden costs. We reject misleading marketing tactics and are committed to delivering a more liberating and enjoyable experience for you [Waterproof and Durability] As a skin-friendly wearable device, the POBOVi Ring meets the highest industry standards, from the coating technology of its titanium exterior to the waterproof treatment of its inner ring. This ensures stable performance in scenarios like swimming pools, gyms, and outdoor adventures, seamlessly integrating into your daily life [Long-Lasting Battery Life] A single charge lasts a full week. The POBOVi Ring features a unique laminated battery that reduces the overall weight without compromising battery life. Paired with its exclusive wireless charging case, it effortlessly keeps up with your busy lifestyle [HSA/FSA Eligible] POBOVi Ring OnePlus is officially eligible for HSA and FSA purchases. Easily use your health savings or flexible spending account to invest in advanced sleep tracking, wellness insights, and recovery support [What’s in the Box] POBOVi Ring OnePlus*1, Wireless Charging Case*1, 1m/3.3ft USB-C Cable*1, Instruction Manual*1 and Quick Guide*1 Engineered with medical-grade titanium alloy, the POBOVi Smart Ring combines aerospace durability with featherlight comfort (3g). Its hypoallergenic, corrosion-resistant design withstands daily wear while maintaining a sleek, jewelry-grade finish. IP68 Waterproof: Swim, shower, or dive up to 100m (328ft) Sleep Architecture Analysis: ✓ Distinguishes REM/Deep/Light sleep with 92% accuracy ✓ Skin temperature tracking (±0.1℃) Cardiopulmonary Monitoring: ✓ Medical-grade PPG sensor (Heart rate ±1bpm) ✓ SpO₂ alerts for altitude/hypoxia risks ✓ HRV-based stress/recovery scoring Athlete-Grade Fitness Tracking Auto-detects 15+ activities (running/swimming/yoga) Calorie burn accuracy boosted by dual motion sensors Uncompromised Longevity 7-Day Battery: Single charge lasts 150+ hours Wireless Fast Charge: 0→100% in 55 minutes