The Apple Watch Series 6 features a Retina Display with a 40mm screen size, powered by Apple's S6 chip. It offers GPS capability and 4G connectivity, along with an in-built ECG application for health monitoring. This model is designed for fitness tracking with a heart rate monitor and runs on watchOS. The watch boasts an always-on display that is brighter than previous models, allowing for easy viewing in any lighting condition. Its built-in GPS enables tracking runs or walks without a connected iPhone. The heart rate monitor can alert users to unusual heart rates, and it includes fall detection with emergency contact alerts. The ECG app allows for electrocardiogram readings, and the Blood Oxygen app measures blood oxygen levels in 15 seconds, which can be beneficial for individuals with certain health conditions. The S6 chip provides a 20% speed increase over previous generations, ensuring faster app loading and a more responsive user experience. It also includes a U1 chip and Ultra Wideband antennas for precise location tracking and car unlocking. The latest watchOS offers customizable watch faces and a Sleep app for sleep tracking and routine establishment.