42mm Space Gray Aluminum Case with Black Sport Band Apple Watch Sport enables you to take a step ahead into the world of technology, no matter whether you're a tech geek or a sport

GPS Over 30% larger display and 50% louder speaker Electrical and optical heart sensors Digital Crown with haptic feedback S4 SiP with faster 64-bit dual-core...

GPS Only Always-On Retina display 30% larger screen Swimproof Electrical and optical heart sensors...

Stainless steel or space black stainless steel case Sapphire crystal;Retina display with Force Touch;Ceramic back Digital Crown;Heart rate sensor, accelerometer, and...