Experience the perfect blend of style and functionality with this QALO QRNT Ring. This modern wearable is designed to enhance your active lifestyle while adding a touch of style to your look. Ideal for those who appreciate both aesthetics and performance in their accessories. From their website: QRNT (pronounced “current”) stands for QALO Ring with NanoTechnology. That means it’s equipped with tiny tech – but the positive impact it can have on your life is anything but tiny. QRNT is the everyday Smart Ring for everybody, no matter where you are in your fitness, wellness, or health journey. Feeling better doesn’t need to be complicated, intimidating, or expensive. With QRNT, it’s fun and easy to make progress at your perfect pace.  Effortlessly and accurately monitor key health metrics like sleep, stress, movement, heart rate variability (HRV), oxygen saturation (SpO2), and skin temperature. Track your progress in the free QALO app, expertly-designed to be fun and empowering, never overwhelming. Access to the app is free, and there are no subscription charges. QRNT is Android and iOS compatible. Size: Width 8.0mm; Thickness 2.85/2.9mm Never been used