Design
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49mm Grade 5 Titanium case (Natural or Black)
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Sapphire crystal front
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Water‑resistant to 100m
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MIL‑STD 810H durability
Display
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Always‑On Retina
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410 × 502 resolution
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Ultra‑bright outdoor visibility
Performance
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S9 SiPwith 4‑core Neural Engine
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64GB storage
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On‑device Siri processing
Sensors
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Electrical & optical heart sensors
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Blood oxygen
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Wrist temperature
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Depth gauge + water temperature
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Compass, altimeter, accelerometer, gyroscope
Adventure & Fitness
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Precision dual‑frequency GPS
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Backtrack & waypoint navigation
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Dive computer features (with apps)
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Emergency Siren
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Fall & crash detection, SOS
Battery
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Multi‑day battery life
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Fast charging
Compatibility
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Works with iPhone
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Runs watchOS 10 and later