Description

• The aluminium case is lightweight and made from 100 per cent recycled aerospace-grade alloy. The Sport Loop is made from a soft and breathable double-layer nylon weave, with a hook-and-loop fastener for quick and easy adjustment.
• New sensor. New insights
  The new blood oxygen sensor is made up of four LED clusters and four photodiodes. Incorporated into the completely redesigned back crystal, this new sensor works in concert with the Blood Oxygen app to determine your blood oxygen level.
• Deeply illuminating
  Green, red, and infrared LEDs shine light onto the blood vessels in your wrist, and photodiodes measure the amount of light reflected back. Advanced algorithms then calculate the color of your blood, which indicates the amount of oxygen present.
• A better day begins with a better night
  Getting the right amount of sleep is important for good health. The new Sleep app helps you establish a regular bedtime routine and keep track of your sleep trends night after night. So you can set and achieve your personal sleep goals.
• Display Always on. Better than ever
  The Always-On Retina display is now significantly brighter outdoors when your wrist is down. So you can see all the information on your watch face more easily than ever — without having to raise your wrist to wake your watch.
• Always-on access
  Swipe down for Notification Center, swipe up for Control Center, or tap complications in the wrist‑down state. No need to wake your watch for simple interactions when you’re in a meeting or otherwise occupied.