Apple Watch Ultra is an entirely new line of Apple Watches that is built for outdoors and challenging sports and designed to push boundaries. It is built out of aerospace grade titanium that is extremely durable and can withstand extreme environments like diving. The largest ever 49mm display is coated with sapphire crystal that is extremely scratch resistant. The Apple Watch Ultra now features a customizable action button and a larger dial that is easier to use with for example gloves. The compass has been redesigned and supports night mode so you can use it more comfortably in dark environments like when diving or at night. In case you are lost while hiking or running, you can utilize the backtrack functionality or alternatively alert others to your location with the 80dB siren built in to the Ultra. The Apple Watch Ultra has improved GPS tracking that offers the best-in-market GPS tracking in the smartwatch market. The Ultra has the largest battery of any Apple Watch yet that lasts up to 36 hours on a single charge that can be extended to as much as 60 hours with low-power mode. The watch supports the same car crash tracking as the Apple Watch 8 and of course offers the versatile sports and health tracking as other Apple Watches. The Apple Watch Ultra is available with three types of new straps that are built for different types of activities including diving and trekking.