With rotating bezel and unique circular interface, easily access your apps and notifications and Battery performance may vary depending on network conditions and configuration, and device usage. Send and receive texts, calendar notifications, news updates, and more right on the Gear S2 classic. Choose from hundreds of custom watch faces to match your style. Compatible with select Bluetooth capable smartphones using Android OS 4.4 and later with at least 1.5GB RAM as well as iPhone 5 and later with iOS 9.0 and above. Complete your individual style with a selection of optional watch straps, creating a personalized look for every moment..Compatible with most Android smartphones. It doesn't have speakers, hence use Level U Bluetooth headphones to hear music.