Apple Watch Series 6Apple announced the Apple Watch Series 6, its latest smartwatch at an event held on its campus earlier this week.We’ve gotten to test the watch for 24 hours ahead of its official launch, and have put together this FAQ to tell you everything you need to know about the Series 6. This includes our impressions of the hardware and software so far and our advice on whether or not you should upgrade from a previous model.Keep in mind these are our first impressions, based on a very limited amount of time with the watch. We’ll have a much more comprehensive review once we’ve had additional testing time.What New Features Does the Apple Watch Series 6 Have?The new Apple Watch’s biggest exclusive feature is its Blood Oxygen Sensor, which uses a cluster of four LEDs and four photodiodes (extremely small lenses). The sensor sends a light that shines through your skin and can determine how effectively oxygen is being carried from your lungs and heart through the rest of your body. A low blood oxygen level can be a sign of respiratory diseases like the flu, but Apple has explicitly said this sensor is meant for fitness and “wellness” tracking, not disease identification or preference