Ultrahuman Ring AIR Smart Ring

Selling my Ultrahuman health tracker ring, Aster Black, Size 13. It's a bit too large for me now, so I've ordered a smaller one. I really love this ring; it's a powerful device with a great, insightful free app and a battery that lasts 6 days or more. There's a tiny bit of wear on the underside, but it's otherwise scratch-free. Comes with the charger, USB-C cable, and original box. These retail for over $450 CAD new. Pickup in the hospital area. It monitors heart rate, HRV, blood oxygen (SpO2), skin temperature, stress, and recovery. It provides detailed sleep insights and a daily recovery score. The app is compatible with iOS and Android. The ring is made of space-grade titanium, is waterproof up to 100M, and has wireless charging.