Apple Watch 38mm Stainless Steel Case with Pearl Woven Nylon Band - MMFH2LL/A Stainless Steel Chassis, Sapphire Glass 1.3" 272 x 340 Display Activity and Heart Rate Monitoring Changeable Faces with Widgets Siri Integration Displays Notifications and Runs Apps Taptic Alerts Apple Pay Bluetooth 4.0, 802.11b/g/n Wi-Fi Apple watchOS 2