LTPO OLED Retina display with Force Touch (1000 nits)
Ion-X strengthened glass
Memory
Capacity 16GB
**1GB = 1 billion bytes; actual formatted capacity less.**
GPS
Built-in GPS, GLONASS, Galileo, and QZSS
Bluetooth
Bluetooth 5.0
Network
Wi-Fi (802.11b/g/n 2.4GHz)
Sensor
Barometric altimeter
Optical heart sensor
Electrical heart sensor
Improved accelerometer up to 32 g‑forces
Improved gyroscope
Ambient light sensor
Digital Crown with haptic feedback
Waterproof
Water resistant 50 meters
**Apple Watch Series 4 has a water resistance rating of 50 meters under ISO standard 22810:2010. This means that it may be used for shallow-water activities like swimming in a pool or ocean. However, Apple Watch Series 4 should not be used for scuba diving, waterskiing, or other activities involving high-velocity water or submersion below shallow depth.**
Band
Sport Band
Band fits 130-200mm wrists.
Battery
Built-in rechargeable lithium-ion battery
Up to 18 hours of battery life
Battery life varies by use and configuration; actual results will vary. See www.apple.com/batteries and www.apple.com/watch/battery.html for more information.
Special Feature
watchOS 5
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What
Microprocessor
S4 with 64-bit dual-core processor W3 Apple wireless chip