Each of the metals used to make Apple Watch (first-generation) is a custom alloy, engineered to be both beautiful and durable. Apple Watch Sport (first-generation) features anodized aluminum cases with a silver, space gray, gold, or rose gold finish. Apple Watch (first-generation) models are crafted from stainless steel or space black stainless steel. Each case is available in two sizes: 38mm and 42mm. There’s also a wide range of interchangeable bands made from a variety of materials. Apple Watch (first-generation) has breakthrough technologies like the Digital Crown, Taptic Engine, and Force Touch. And with up to 18 hours of battery life, you can use it all day long. Battery life varies by use and configuration; actual results will vary. Apple Watch is splash and water resistant but not waterproof. You can, for example, wear and use Apple Watch during exercise, in the rain, and while washing your hands, but submerging Apple Watch is not recommended. Receive and respond to notifications in an instant. Track your daily activity. Control your music using only your voice. Pay for groceries just like that. With Apple Watch, important information and essential features are always just a raise of the wrist away.