Apple Watch Series 4 (GPS, 44mm) – Space Gray Aluminium Case with Black Sport Band

GPS

Over 30% bigger display screen and 50% louder audio speaker

Electrical and optical heart sensing units

Digital Crown with haptic comments

50% louder audio speaker

S4 SiP with faster 64-bit dual-core processor

Enhanced accelerometer as well as gyroscope for loss detection

Swim evidence – Water immune upto 50 meters

watch OS 5

Light weight aluminum situation

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