Apple Watch Series 7 45mm is The larger display enhances the entire experience, making Apple Watch easier to use and read. Series 7 represents our biggest and brightest thinking. You don’t need to raise your wrist or touch the screen to see the time or other information and complications on your watch face, because the display is always on. And it’s 70% brighter indoors when your wrist is down. The front crystal has been redesigned with a flat base, creating a sturdier shape more resistant to cracks. Measure your blood oxygen level with a revolutionary sensor and app. Take an ECG anytime, anywhere. Check your heart rate. Along with other innovations like mindfulness and sleep tracking to keep you healthy from head to toe. Series 7 puts more health insights in sight.