1.4 full circle AMOLED display with a scratch resistant sapphire crystal and stainless steel body;Compatible with most devices with an iOS 8.2 or Android 4.3 or later operating system;Get notifications and alerts for calls, texts, and apps with over 4000 Android Wear apps to choose from;A variety of pre-installed watch faces and easily swappable bands for your own unique style;Accurate fitness tracking with enhanced heart rate monitor and sensors to track running, walking, and more