Wear OS by Google works with phones running the latest version of Android (excluding Go edition and phones without Google Play Store) or iOS. Supported features may vary between platforms and countries with compatibility subject to change.- 24 Hr + multi day Extended Mode **Varies based on usage and after updates install**. USB data cable with magnetic dock snaps to split rings on watch caseback and spins 360 degrees for ease of use. Approximately half an hour to reach 80%.- Always on Display now brighter with more colors. Thousands of watch faces to personalize your look and always see the time. Hundreds of apps from assistant to fitness, payments, music, social, news, games, stop watches, and more. With a 3 ATM design and charging in about half an hour, its perfect for all your activities.- Automatically tracks activity goals, steps, sleep, heart rate, cardio level, SPO2 (blood oxygen), and more. Activity modes with GPS keep you on track with your distance and path. Advanced sensors provide the data to power all your health and fitness apps.- Stay connected with notifications for calls, texts, apps and automatic time, time zone and calendar syncing. Never miss a call - answer and make calls directly on your watch when your phone is out of reach. Optimize your battery life with a newly simplified Smart Battery Modes.