Description Apple Watch Ultra Introducing a watch that pushes boundaries for athletes that do the same. Adventure awaits. Meet the most rugged and capable Apple Watch ever. With a robust titanium case, precision dual-frequency GPS, up to 36 hours of battery life, the freedom of cellular, and three specialized bands made for athletes and adventurers of all kinds Case Size 49MM Trail Loop Band Yellow/Beige Blue/Gray Black/Gray Read More 100m water resistantfootnote² Swimproof and recreational diving to 40mfootnote EN13319 certificationfootnote Depth gauge with water temperature sensor Certified IP6X dust resistant Tested to MIL-STD 810Hfootnote Customizable Action button Always-On Retina display Up to 2000 nits brightness Blood Oxygen appfootnote⁴ ECG appfootnote⁵ High and low heart rate notifications Irregular rhythm notificationfootnote Cardio fitness notifications Temperature sensingfootnote⁷ Cycle Tracking with retrospective ovulation estimatesfootnote Emergency SOSfootnote⁹ International emergency callingfootnote Fall Detection Crash Detectionfootnote⁹ High-g accelerometer 86-decibel Siren to attract attention Cellular connectivityfootnote Supports Family Setupfootnote Connect family members who don’t have an iPhone Related