• See how you're sleeping with the Sleep app – it tracks how much time you spend in REM, Core or Deep sleep
• Take an ECG whenever you want, or measure blood oxygen right from your Watch
• Fall Detection is optimised while you're using the Workout app, helping to keep you safer With 18 hours of battery life, it's ready for all-day wear
• Boost the battery life with Low Power Mode – it ups the battery to last an impressive 36 hours
• Family Setup mode lets you pair your kids watches to your phone if they don't have their own
• It's got all the features you love from previous generations, like Maps, Apple Pay and Siri

Size / fit: Universal (can be configured for either S / M or M / L length)
Size: 45 mm
Weight: 51.5g
Strap: Silicone, Pin-and-tuck closure
Connectivity: WiFi, Bluetooth 5.0
GPS: Yes
Battery type: Built-in rechargeable Lithium-ion battery
Charging method: Wireless charger
Battery life: Up to 18 hours
Type: Always-On Retina OLED display
Touchscreen: Yes
Resistance: Water resistant (up to 50 m)
Voice assistant: Siri
Health & fitness tracking: Blood oxygen, ECG app, High and low heart rate notifications, Irregular rhythm notifications, Sleep stages, Menstrual cycle tracking
Smart functions: Voice calling, Read and reply to texts & emails, Smartphone notifications, Contactless payment, Music remote, Alarm
Other features: S8 with 64-bit dual-core processor, W3 Apple wireless chip, U1 chip, International emergency calling, Emergency SOS, Fall detection, Crash detection, Noise monitoring, 32 GB capacity
Sensors: Accelerometer, Barometer, Compass, Pedometer, Gyroscope, Heart rate, Ambient light sensor, Temperature