Apple Watch Ultra 3 Others

 retains the same rugged 49mm aerospace-grade titanium case as its predecessors but incorporates a larger and brighter Always-On Retina display protected by a flat sapphire crystal. The display offers a resolution of 422×514 pixels, and its peak brightness has been increased to 3,000 nits, making it even more readable in direct sunlight.

• Satellite communications: A major new feature is the built-in satellite communication capability, which allows for emergency messaging and location sharing when the watch is out of cellular or Wi-Fi range.
• 5G support: The 
  Ultra 3

   is equipped with a new 5G modem, providing faster cellular performance for downloading music, podcasts, and data on the go.

• New health metrics: The watch introduces hypertension notifications, which can detect patterns of chronic high blood pressure over 30-day periods. It also offers a new “Sleep score” that analyzes the quality of your sleep.
• Enhanced fitness tracking: An AI-powered “Workout Buddy” offers personalized audio coaching during workouts. The watch also features more advanced running metrics and power zone tracking for cyclists.
• Extended battery life: Despite a more advanced display and 5G connectivity, the battery life has been extended to up to 42 hours of normal use and up to 72 hours in Low Power Mode. Fast charging has been improved, with 15 minutes of charging providing up to 12 hours of normal use.

 case is made from 100% recycled titanium, and the battery uses 100% recycled cobalt. The manufacturing process uses 100% renewable electricity.