Aluminum case with Sport Band
Wi-Fi (802.11b/g/n 2.4Ghz)
Heart rate sensor
Ambient light sensor
OLED Retina display with Force Touch
Built-in rechargeable lithium-ion battery
Up to 18 hours of battery life²
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 1 is splash and water resistant but not waterproof.
You can, for example, wear and use Apple Watch Series 1 during exercise, in the rain, and while washing your hands, but submerging Apple Watch Series 1 is not recommended.
Apple Watch has a water resistance rating of IP67 under IEC standard 60529.
²Testing 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 Watch via Bluetooth, over the course of 18 hours.