• Built-in GPS, GLONASS, Galileo, and 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 life • Water resistant 50 meters • watchOS 5 • Series 4 (GPS)