Apple Watch Series 7 GPS + Cellular, 41mm Graphite Stainless Steel Case with Graphite Milanese Loop Apple Watch Series 7 features a larger, more advanced display, enhanced durability, faster charging, and innovative new health features. The always-on Retina display is 70% brighter indoors when your wrist is down than the Series 6, and the expanded screen area makes it easier to use and read. It automatically detects when you start a work-out, even when cycling, and can monitor blood oxygen, heart rate, sleep, and more, to guide you towards the healthiest you. Larger display The larger display of Watch Series 7 enhances the whole experience of using it. The borders have been reduced by 40%, giving 20% more screen area than the Series 6, and all while barely expanding the dimensions of the watch itself. A subtle wrap-around effect is created by refracted light at the edge of the display, while across the system, buttons have been redesigned to take advantage of the larger display, so apps are easier to use. And a QWERTY keyboard lets you tap or slide from letter to letter with Quick Path. Blood oxygen Apple Watch Series 7 s blood oxygen sensor incorporates LEDs and photodiodes in the back crystal. You can easily take readings of your blood oxygen, or let the watch capture background readings, day and night, to provide this key indicator of your overall wellness. Sleep well Set and achieve your personal sleep goals with the Sleep app; it s been designed to help you establish a regular bedtime routine and keep track of your sleep trends night after night. Fast charging With an updated charging system and fast-charging USB-C cable, the Series 7 recharges up to 33% faster than the 6, taking around 45 minutes to go from 0 to 80%. Workout detection, including when Cycling Apple Watch Series 7 can tell when you ve started a work out; it ll alert you to fire up the Workout app, even when you start cycling. Handily, the Watch will credit you for the exercise you ve already done