Apple Watch Sport features

• Silver, space gray, gold, or rose gold anodized aluminum case
• Ion-X glass
• Retina display with Force Touch
• Composite back
• Sport Band with stainless steel pin
• Digital Crown
• Heart rate sensor, accelerometer, and gyroscope
• Ambient light sensor
• Speaker and microphone
• Wi-Fi (802.11b/g/n 2.4GHz)
• Bluetooth 4.0
• Up to 18 hours of battery life*
• Water resistant**
• Apple Watch may ship with watchOS. But watchOS 2 is available as a free download.