What is series 6?

Series 6 generally refers to the sixth generation of Apple Watch, released on September 18, 2020. Some key features of the Series 6 include:

• Blood oxygen sensors that measure the oxygen saturation in the user's blood
• Always-on Retina display that is 2.5 times brighter outdoors than the previous models
• A new S6 system-in-package (SiP) that is up to 20% faster than the previous model
• New color options, including blue and (PRODUCT)RED
• New watch faces, including a GMT face that shows multiple time zones, and a cycling face
• Water resistance up to 50 meters for swim tracking and other water-based activities

Additionally, the Series 6 has all the features of previous Apple Watch models, such as fitness tracking, heart rate monitoring, GPS, cellular connectivity, and the ability to make phone calls and send messages from the watch.