To create the perfect sports watch, we carefully crafted every element with special attention to detail, delivering unrivaled performance. Titanium provides the perfect balance between weight, strength and corrosion resistance. The new case design rises up to surround the flat sapphire crystal and protects it from impacts at the edges. The digital crown is larger and the side button protrudes from the case, making it easier to use the watch with gloves. Exclusive to Apple Watch Ultra, the Wayfinder watch face features a time face that can be switched to a real-time compass and eight additional functions. In low-light conditions, you can turn the digital crown to activate Night Mode and watch the watch face turn bright red. The new action button gives you quick and physical control of multiple functions. They are customizable and can perform actions such as managing a workout, marking a compass point or starting a dive. Just like you, they are full of potential. Battery life for days. When you’re on day two of a backpacking trip, the final leg of a triathlon, or diving along a coral reef, the last thing you want to think about is running out of battery. With longer battery life than ever, you can do almost anything and save power. GPS performance is critical for athletes who need the most accurate metrics, whether they’re training on city streets or in the great outdoors. Apple Watch Ultra features a new high-precision dual-frequency GPS system that delivers incredible accuracy in the most challenging places. For most people, traditional GPS with L1 GPS works most of the time. But it can be challenging when tall buildings, trees, or dense foliage block satellites. The new L5 GPS provides improved signal processing, reducing errors and providing a more stable signal in environments like densely populated cities. If you are lost or injured and want to attract attention, hold the action button to activate the siren, which can be heard up to 180 meters away. Operating temperature from -20°C to 55°C.