Apple Watch Ultra 4 GPS + Cellular 49mm Natural Titanium Case with Translucent Gray Ocean Band - Mjad4ls

Apple Watch Ultra 4 (MJAD4LS) — Key Features

Health Sensing System

• Most accurate heart rate sensing in a wearable: Redesigned optical and electrical heart sensors with larger, more efficient green LEDs, validated by a study of over 1,000 participants .

• Continuous background monitoring: Measures heart rate every 5 seconds throughout the day for deeper fitness and physiological insights .

• HRV measurement up to 24x more frequent: Provides both Recovery HRV (for daily stress/recovery signals) and Overall HRV (for broader cardiovascular health) .

• Readiness Score: Daily score (0–10) analyzing recent activity, Training Load, vitals, and Sleep Score, with actionable recommendations (Recover, Pace Yourself, Ready, or Go For It) .

Performance & Battery

• S11 chip: 64-bit dual-core processor with 4-core Neural Engine and 64GB storage, enabling advanced on-device processing and features .

• Up to 50 hours battery: Normal use delivers more than two days of battery life .

• Up to 84 hours in Low Power Mode: Extended battery for longer adventures .

• Fast charging: 15 minutes of charge provides up to 18 hours of additional battery life .

• Max Extended Workout mode: Up to 45 hours of outdoor workout tracking with full GPS and heart rate readings .

Durability & Design

• Aerospace-grade titanium case: Available in Natural and Black titanium finishes .

• Water resistant to 100m (WR100): IP6X dust resistance and EN13319 certification for recreational scuba diving up to 40m .

• Built-in depth gauge and water temperature sensor: Supports scuba diving and high-speed water sports .

Safety & Connectivity

• Satellite communications: Emergency SOS, Find My, and Messages via satellite included free for two years with activation .

• Precision dual-frequency GPS (L1+L5): Most accurate GPS in a sports watch, evaluated for route accuracy in challenging urban environments .

• GPS + Cellular (5G): Stay connected without iPhone nearby .

Intelligence & watchOS 27 Features

• Siri AI with Apple Intelligence: Personal context understanding and broad world knowledge on the wrist .

• Audio Intelligence: Includes Live Rewind, Siri Recap, Sound Recognition, and faster Shazam; requires S11 chip for on-device processing .

• New single-handed tap gesture: Open Smart Stack widgets by tapping index finger and thumb; double tap to scroll, single tap to select .

• Cycle Tracking support: Now includes perimenopause and menopause support .

• Workout Buddy: Available on Apple Watch without iPhone nearby, with expanded fitness data and Spanish language support .

Environment

• 45% recycled material overall: Includes 100% recycled titanium in the 3D-printed case and 100% recycled cobalt in the battery .

• 100% fiber-based packaging: Recyclable at home .

Compatibility

• Requires iPhone 11 or later with iOS 27 or later