Apple Watch Series 7 lets you measure your blood oxygen level. Take an ECG from your wrist. See your fitness metrics. Features an Always-On Retina display with 20% more screen area than Series 6. Set a bedtime routine and track your sleep. And reply to calls and messages right from your wrist. It’s the ultimate device for a healthier, more active, more connected life. MORE DETAILS: Display: 1.9" "Always-On Retina" LTPO OLED screen Chipset: S7 Storage: 32 GB Durability: IPX6 Waterproof: Up to 50 meters Sensors: Heart rate, ECG, SpO2 Size 45mm Available in aluminum NOTE: Your Apple Device is guaranteed to be in good working condition and comes with a limited 90-day manufacturer’s warranty against manufacturer defects. Devices are not accepted for returns in store - defective/damaged returns must be initiated through customer service.