Over the past decade, September has been the month when Apple revealed its latest iPhone. The company served up swaggering advances in technology, year after year, that propelled its business as Apple became the world’s most valuable company.

But as the marquee device has grown older and its improvements have gotten more incremental, the tech giant has shifted its focus to younger products with more runway for innovation: the Apple Watch and AirPods.

Apple on Wednesday unveiled a fitness-focused version of its wearable computer, the Apple Watch Ultra. Aimed at triathletes, distance runners, scuba divers and backcountry enthusiasts, the rugged $800 model features a larger screen and improved durability. It also has an "action” button to make it easier to use while wearing gloves, bigger speakers for calls in windy conditions and a larger battery with a 36-hour life span on a charge.