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| General | Dimensions • Height: 49 mm (1.92″) • Width: 44 mm (1.73″) • Depth: 12 mm (0.47″) Weight • 61.6 g (2.17 oz) Size • Case: 49 mm (1.92″) • Band: 145 mm - 220 mm (5.70″ - 8.66″) Color • Case: Natural • Loop: Blue/Bright Blue Enclosure • Front: Sapphire Crystal • Back: Ceramic / Sapphire Crystal • Frame: Titanium (Grade 5) • Loop: Polyester Connectivity • GPS + Cellular Model Number • MEWU4X/A Release Year • 2025 Condition • New |
| Network | Technology • GSM / HSPA / LTE / 5G 2G Bands • GSM 850 / 900 / 1800 / 1900 3G Bands • HSDPA 850 / 900 / 1700 (AWS) / 1900 / 2100 4G Bands • 1, 2, 3, 4, 5, 6, 7, 8, 18, 19, 20, 25, 26, 28, 39, 40, 41, 66 5G Bands • SA/NSA Speed • HSPA, LTE, 5G |
| SIM | • 1 x e-SIM |
| Chip | • S10 chip with 64‑bit dual-core processor • 4‑core Neural Engine • 64GB capacity |
| Durability | • Water resistance 100m (swim, snorkel, scuba, high-speed water sports) under ISO standard 22810:2010 • Dust resistance IP6X under IEC 60529 • 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 |
| Buttons & Hardware |
• 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 |
| 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) |
| Operating System | • watchOS 26, upgradable to watchOS 26.1 |
| Audio |
• Three-microphone array with beamforming and wind noise mitigation • Dual speakers • Media playback • Siren |
| Connectivity |
• Support for 2.4GHz & 5GHz Wi-Fi networks • Wi-Fi 4 (802.11n) • Bluetooth 5.3 • L1 and L5 precision dual-frequency GPS (GPS, GLONASS, Galileo, QZSS & BeiDou) • Second-generation Ultra Wideband chip • Apple Pay • GymKit • Supports RedCap for 5G & LTE • FDD‑5G NR (Bands n1, n2, n3, n5, n7, n8, n12, n14, n20, n25, n26, n28, n66, n71) • TDD‑5G NR (Bands n38, n40, n41, n53) • FDD‑LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 66, 71) • TDD‑LTE (Bands 38, 39, 40, 41, 53) • Support for Apple Watch For Your Kids • International roaming |
| 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 & 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 |
| Workouts & Activity | Running • Custom workouts • Customizable Workout Views • Training load • Heart Rate Zones • Race Route • Pacer • Precision Start using Action button • Stride length, ground contact time, 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 Cycling • Average speed, elevation gained, and distance • Connection to cycling accessories via Bluetooth • Functional Threshold Power • Power Zones • Cadence • Live Activity on iPhone Swimming • Custom workout for Pool Swim • Splits and auto sets • SWOLF score • Stroke type tracking • Automatic stroke detection • Kickboard detection • Average pace, total distance, and laps Diving • Recreational dive to 40m • Dive computer app (available on the App Store) • 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 SOS • International emergency calling • Siren • Flashlight • Crash Detection • Fall Detection • Last Emergency Call Availability Waypoint • Noise monitoring • Backtrack |
| Power & Battery |
• 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 capable • Up to 80% charge in about 45 minutes • 15 minutes for up to 12 hours of normal use • 5 minutes for up to 8 hours of sleep tracking |
| Environmental Requirements | On-wrist Operating Temperature • –4° F ~ 130° F (–20° C ~ 55° C) Operating Temperature • 32° F ~ 95° F (0° C ~ 35° C) Non-operating Storage Temperature • –4° F ~ 113° F (–20° C ~ 45° C) Dive Operating Temperature • 32° F ~ 104° F (0° C ~ 40° C) Relative Humidity • 5% ~ 90% (Noncondensing) Operating Altitude • –1600 feet ~ 29,500 feet (–500 m ~ 9000 m) |
| In the Box |
• 1 x Natural Titanium Case 49 mm (GPS + Cellular) • 1 x Blue/Bright Blue Trail Loop (M/L) • 1 x Magnetic Fast Charger to USB-C Cable (1 m) • 1 x Documentation |