Apple Watch Ultra 4 Smartwatch, Always-On Retina Display, S11 Chip, watchOS, Water Temperature Sensor, 49mm Natural Titanium Case, Standard Band Size, Translucent Gray Ocean Band | MJAD4AF/A

Watch Ultra 4 A battery you can’t outrun. Specifications Controls Action Button Customizable Digital Crown Haptic feedback Side Button Included Gestures Single tap, double tap, and wrist flick Siri Powered by Apple Intelligence Chip Processor S11 chip with 64-bit dual-core processor Neural Engine 4-core Neural Engine Storage Capacity 64GB Apple Intelligence & Siri AI Apple Intelligence powers Siri AI with more personal, conversational, and powerful interactions Sensors Health Sensing System 2nd-generation electrical heart sensor, always-on optical heart sensor, blood oxygen sensor, temperature sensor Depth Gauge Included Water Temperature Sensor Included Compass Included Altimeter Always-on Accelerometer High-g Gyroscope High dynamic range Ambient Light Sensor Included Health & Wellness Readiness App Included Vitals App Heart rate, respiratory rate, wrist temperature, blood oxygen, sleep duration, and HRV Blood Oxygen App Included ECG App Included Heart Rate App Included Heart Rate Notifications High and low heart rate notifications Recovery HRV Supported Background Heart Rate Tracking High-frequency Irregular Rhythm Notifications Supported Cycle Tracking Advanced cycle tracking with fertile window and retrospective ovulation estimates Medications App Included Mindfulness App State of mind tracking Noise App Included Sleep App Sleep stages and sleep tracking Sleep Score Supported Sleep Apnea Notifications Supported Display Display Type Always-On Retina display with wide-angle OLED and LTPO3 Refresh Rate 1Hz Active Area 422 × 514 pixels Pixel Density 326 ppi Cover Glass Flat sapphire crystal Peak Brightness 3000 nits Minimum Brightness 1 nit Night Mode Supported on Modular Ultra, Wayfinder, and Orienteering faces Audio Microphones Three-microphone array with beamforming and wind noise mitigation Speakers Dual speakers Media Playback Supported Siren Included Battery & Power Normal Use Up to 50 hours Low Power Mode Up to 84 hours Outdoor Workout Up to 18 hours Extended Workout Up to 25 hours Max Extended Workout Up to 45 hours Battery Type Built-in rechargeable lithium-ion Fast Charging Supported Charge to 80% About 45 minutes 15-Minute Charge Up to 18 hours of normal use 5-Minute Charge Up to 10 hours of sleep tracking Operating System OS watchOS Running Custom workouts, customizable workout views, training load, heart rate zones, VO₂ max, race route, pacer, precision start, running metrics, multisport, pace and target alerts Hiking Compass with bearing/incline/elevation/coordinates, custom waypoints, Backtrack GPS, elevation alerts, topographic maps, curated hikes, Siren Cycling Custom workouts, training load, speed, elevation, distance, power meter support, FTP, Live Activity, heart rate zones, cadence, power zones Swimming Pool/open-water workouts, splits, auto sets, SWOLF, stroke detection, water temperature, pace, distance, heart rate, laps Diving Recreational diving to 40m, dive computer app, automatic launch at 1m, depth/duration tracking,