Apple iWatch Series 4 details
Apple iWatch Series 4 Space Gray aluminum case Built-in GPS, GLONASS, Galileo, and QZSSS4 with 64-bit dual-core processor W3 Apple wireless chipBarometric altimeterCapacity 16GB1Optical heart sensor electrical heart sensorImproved accelerometer up to 32 g‑forces improved gyroscopeAmbient light sensorLTPO OLED Retina display with Force Touch (1000 nits)Digital Crown with haptic feedback order speaker-X strengthened glass sapphire crystal and ceramic back Wi-Fi (802.11b/g/n 2.4GHz)Bluetooth 5.0Built-in rechargeable lithium-ion battery up to 18 hours of battery life2Water-resistant 50 meters3watchOS 5
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