Water resistant 50 meters¹
Wi-Fi (802.11 b/g/n 2.4Ghz)
Heart rate sensor
Ambient light sensor
Second-generation OLED Retina display with Force Touch (2x brighter)²
Ion-X glass (aluminum cases)
Built-in rechargeable lithium-ion battery
Up to 18 hours of battery life³
Magnetic charging cable
Apple Watch requires an iPhone 5 or later. Classic Buckle, Leather Loop, Modern Buckle, Milanese Loop, and Link Bracelet bands are not water resistant.
¹Apple Watch Series 2 has a water resistance rating of 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.
²Compared with the previous generation.
*All models come in distinct case and band combinations. Sport Band, Woven Nylon, stainless steel, and leather bands are all compatible with all Apple Watch models.
³Testing conducted by Apple in August 2016 using preproduction Apple Watch Series 1, Apple Watch Series 2, and Apple Watch Edition, each paired with an iPhone; all devices tested with prerelease software.
All-day battery life is based on 18 hours with the following use: 90 time checks, 90 notifications, 45 minutes of app use, and a 30-minute workout with music playback from Apple.