Material and Finish Titanium case, Grade 5 Natural, Black Size and Weight Height: 49mm Width: 44mm Depth: 12mm 422 by 514 pixels 1245 sq mm display area Weight (natural): 61.6 grams Weight (black): 61.8 grams Fits 130-210mm wrists Hardware and Buttons Microphone Speaker Customizable Action button Siren/Speaker Antennas (GPS, cellular/satellite) Microphone Side button Microphone Digital Crown Depth gauge/Water temperature sensor/Altimeter Controls Customizable Action button Digital Crown with haptic feedback Side button Double tap and wrist flick gestures Siri with on-device processing Chip S10 chip with 64-bit dual-core processor 4-core Neural Engine 64GB capacity Sensors Electrical heart sensor Third-generation optical heart sensor Blood oxygen sensor Temperature sensor Depth gauge Water temperature sensor Compass Always-on altimeter High-g accelerometer High dynamic range gyroscope Ambient light sensor Health and Wellness Blood Oxygen app ECG app Cycle Tracking app with retrospective ovulation estimates Heart Rate app High and low heart rate notifications Irregular rhythm notifications Medications app Mindfulness app with state of mind tracking Noise app Sleep app including sleep stages Sleep score Sleep apnea notifications Hypertension notifications Display Always-On Retina display with wide-angle OLEDs and LTPO3 1Hz refresh Active area (422 by 514 pixels, 326 pixels per inch) Flat sapphire crystal display Up to 3000 nits peak brightness 1 nit minimum brightness Night Mode for Apple Watch Ultra faces (Modular Ultra, Wayfinder, Orienteering) Audio Three-microphone array with beamforming and wind noise mitigation Dual speakers Media playback Siren Power and Battery Life Multiday battery life, up to 42 hours of normal use Up to 72 hours in Low Power Mode Built-in rechargeable lithium-ion battery Fast-charge capable9 Up to 80% charge in about 45 minutes9 15 minutes for up to 12 hours of normal use 5 minutes for up to 8 hours of sleep tracking Operating System watchOS watchOS is the world’s most advanced wearable operating system, with apps and features designed to keep you active, healthy, safe, and connected. Workouts and Activity Running Custom workouts Customizable Workout Views Training Load / Workout Effort Tracking Heart Rate Zones (customizable) Postworkout heart rate VO2 max Race Route Pacer Precision Start using Action button Stride Length, Ground Contact Time, Cadence, Power, and Vertical Oscillation Automatic track detection Multisport workout Hiking Compass with bearing, incline, elevation, and coordinates Custom waypoints Automatically generated waypoints to cellular connectivity Backtrack GPS data Offline maps with custom route creation Elevation alerts Topographic maps for thousands of national and regional parks (U.S. only) Hundreds of curated hikes across all 63 U.S. national parks Siren Cycling Custom workouts Customizable Workout Views Training Load / Workout Effort Tracking Average speed, elevation gained, and distance Bluetooth-compatible with power meters Functional Threshold Power (with power meter connection) Live Activity on iPhone Heart Rate Zones (customizable) Cadence (rpm), speed (mph), power (watts), power zones (with power meter connection) Postworkout heart rate Swimming Custom workouts (pool swim) with haptics to cue the next interval Customizable Workout Views (pool swim, open water swim) Splits and auto sets SWOLF score Automatic stroke and count detection (including kickboard) Water temperature Average pace, total distance, heart rate, and laps Diving Recreational dive to 40m Dive computer app (available on the App Store)11 Automatic launch at 1m Current and maximum depth duration GPS entry and exit points Depth gauge Water temperature sensor More Workouts Skiing Snowboarding Outdoor Rowing Paddling Golf Walk Elliptical Rower Stair Stepper HIIT Yoga Functional Strength Training Dance Cooldown Core Training Pilates Tai Chi Wheelchair Kickboxing Multisport and more Safety Satellite connectivity (Emergency SOS, Messages, Find My) Emergency SOS13 International emergency calling Siren Flashlight Crash Detection Fall Detection Last Emergency Call Availability Waypoint Noise monitoring Backtrack Durability Water resistance 100m (swim, snorkel, scuba, high-speed water sports) under ISO standard 22810:201015 Dust resistance IP6X under IEC 6052916 EN13319 recreational scuba diving to 40m ( 1m accuracy) Tested to MIL-STD 810H against subsections for altitude, high temperature, low temperature, temperature shock, immersion, freeze with thaw, ice and freezing rain, and shock and vibration Connectivity L1 and L5 precision dual-frequency GPS (GPS, GLONASS, Galileo, QZSS, and BeiDou) Cellular: 5G17 and LTE18 Wi-Fi 4 (802.11n) Support for 2.4GHz and 5GHz Wi-Fi networks Bluetooth 5.3 Second-generation Ultra Wideband chip19 NFC: Apple Pay20, GymKit Support for Apple Watch For Your Kids International roaming Accessibility Built-in accessibility features supporting vision, mobility, hearing, and cognitive disabilities. Learn more Features include: VoiceOver Zoom On/Off Labels Reduce Transparency Increase Contrast Color Filters Text Size Bold Text Reduce Motion Hourly Chimes AssistiveTouch Button Click Speed Touch Accommodations Auto-Answer Calls Type to Siri RTT Support Audio Volume Balance Audio Transcription Live Speech Accessibility Shortcut Mono Audio Taptic Time Personal Voice Live Listen Environmental Requirements On-wrist operating temperature: -4 to 130 F (-20 to 55 C) Operating temperature: 32 to 95 F (0 to 35 C) Non-operating storage temperature: -4 to 113 F (-20 to 45 C) Dive operating temperature: 32 to 104 F (0 to 40 C) Relative humidity: 5% to 90% noncondensing Operating altitude: -1600 feet to 29,500 feet (-500m to 9000m) Apple Watch and the Environment Apple Watch Ultra 3 is designed to reduce environmental impact:23 See the Apple Watch Ultra 3 Product Environmental Report (PDF) Progress toward Apple 2030 Apple 2030 is our commitment to be carbon neutral for our entire carbon footprint. Our plan to decarbonize products is rigorous and focuses on transitioning to low-carbon electricity, designing with recycled and low-carbon materials, and prioritizing lower-carbon ways of shipping products, like ocean freight. Materials Apple Watch Ultra 3 is made with 40% recycled content,24 including: 100% recycled titanium in the case 100% recycled cobalt and 95% recycled lithium in the battery 100% recycled rare earth elements in all magnets 100% recycled gold plating and tin solder in all Apple-designed printed circuit boards 100% recycled tungsten in the Taptic Engine 80% recycled steel in the speaker and Taptic Engine Energy 100% of manufacturing electricity for Apple Watch Ultra 3 is sourced from renewable electricity25 100% of expected customer energy use matched with low-carbon electricity Meets California Energy Commission’s energy efficiency standards for battery charger systems26 Packaging 100% fiber-based packaging Waste No established final assembly sites generate waste sent to landfill as part of Apple’s Zero Waste Program Smarter chemistry All of the materials used in Apple products, accessories, and packaging are covered by the requirements of our Regulated Substances Specification, which was one of the first in industry to restrict the use of key substances of concern. See the latest Environmental Progress Report to understand Apple’s recent efforts in phasing out these chemistries. Compatibility iPhone 11 or later, including iPhone SE (2nd generation or later), with iOS 26 or later What’s in the box Apple Watch Ultra Band Apple Watch Magnetic Fast Charger to USB-C Cable (1m)