GPS, GLONASS, Galileo, and QZSS
Barometric altimeter
Water resistant
50 meters1
Electrical heart sensor
Optical heart sensor
Improved accelerometer
up to 32 g-forces
Improved gyroscope
Ambient light sensor
Speaker
50 percent louder
Microphone
Apple Pay
GymKit
Capacity 16GB
Ceramic and sapphire crystal back
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