Case thickness: 7 mm, Case size: 43 mm, Band width: 20 mm,Band material : silicone black tone Wear OS by Google works with phones running Android 6.0+ (excluding Go edition) and iOS 10.0+. Supported features may vary across platforms and countries. Activity Tracker,Heart Rate,Notifications,Touchscreen,Social media updates,Text/email alerts,Swimproof technology,Payment technology,GPS ,Display animation,Smart help from Google,Voice-activated Google Assistant Compatibility: Android 4.4+ (excluding Go edition), iOS 9.3+,Connectivity: Bluetooth Smart Enabled / 4.2 Low Energy Water Resistant: 3 ATM