40mm or 44mm Aluminum (Gold, Space Gray, or Silver)
Stainless Steel (Silver or Space Black)
64-bit dual-core S4 processorUp to 2x faster than S3 processor
LTPO OLED Retina display with Force Touch 1000 nits brightness
Water resistant to 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 2 should not be used for scuba diving, waterskiing, or other activities involving high-velocity water or submersion below shallow depth.
Built-in LTE/UMTS (optional), Built-in GPS, heart rate sensor, accelerometer, and gyroscope.
Up to 18 hours.