Fundamentally redesigned and reengineered. The largest Apple Watch display yet. Built-in electrical heart sensor. New Digital Crown with haptic feedback. Low and high heart rate notifications. Fall detection and Emergency SOS. New Breathe watch faces. Automatic workout detection. New yoga and hiking workouts. Advanced features for runners like cadence and pace alerts. New head-to-head competitions. Activity sharing with friends. Personalized coaching. Monthly challenges and achievement awards. Built-in cellular lets you use Walkie-Talkie, make phone calls, and send messages. Stream Apple Music and Apple Podcasts. And use Siri in all-new ways – even while you’re away from your phone. With Apple Watch Series 4, you can do it all with just your watch.Renewed products look and work like new. These pre-owned products have been inspected and tested by Amazon-qualified suppliers, which typically perform a full diagnostic test, replacement of any defective parts, and a thorough cleaning process. Wireless devices have batteries tested to have at least 80% capacity relative to new at the time of sale. Packaging, wall plug, Watch Strap, and charging cable may be generic (headphones not included). Wireless products on Amazon Renewed come with the 90
GPS + Cellular. S4 SiP with faster 64-bit dual-core processor
Over 30% larger display and 50% louder speaker , 50% louder speaker
Digital Crown with haptic feedback. Electrical and optical heart sensors.
Improved accelerometer and gyroscope for fall detection. Swimproof. watchOS 5