1. 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.
Key Features: Gold aluminum case Built-in GPS GLONASS Galileo QZSS S4 with 64-bit dual-core processor W3 Apple wireless chip Barometric altimeter Capacity 16GB1 Optical heart sensor Electrical heart sensor Improved accelerometer up to 32 g‑forces Improved gyroscope Ambient light sensor LTPO OLED Retina display with Force Touch (1000 nits) Digital Crown with haptic feedback Louder speaker Ion-X strengthened glass Sapphire crystal and ceramic back Wi-Fi (802.11b/g/n 2.4GHz) Bluetooth 5.0 Built-in rechargeable lithium-ion battery Up to 18 hours of battery life2 Water resistant 50 meters3 watchOS 5
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