Apple watch series 6 40mm cellular stainless steel technical specifications: retina display, 40mm screen size apple's s6 chip gps capability 4g connectivity ecg in-built applicaton fitness tracking: heart rate monitor watchos apple watch series 6 40mm gps 4g stainless steel display one of the standout features of the apple watch series 6 40mm gps 4g stainless steel is its always-on display. This means that you can glance at your watch to check the time or see important notifications without having to lift your wrist or tap the screen. The display is also brighter than previous models, making it easier to see in bright sunlight or other well-lit environments. Gps function in addition to the always-on display, the apple watch series 6 40mm gps also boasts a number of health and fitness features. It has a built-in gps, which means you can track your runs or walks without needing to bring your iphone along. It also has a heart rate monitor, which can alert you if your heart rate goes above or below a certain threshold. Plus, it can detect if you've taken a hard fall and send an alert to your emergency contacts if you don't respond within a certain amount of time. Ecg app the apple watch series 6 40mm gps also has an ecg app, which can take an electrocardiogram reading right from your wrist. This can help you detect irregular heart rhythms or other heart issues. Additionally, it has a blood oxygen app, which can measure your blood oxygen levels in just 15 seconds. This can be ...