This is the Apple Watch Series 9 with a 45mm stainless steel case and Milanese Loop in Graphite color. It is compatible with iOS - Apple and has a number of features including a heart rate monitor. The brand is Apple and the model is Apple Watch Series 9. The case color and band color are Graphite and the band material is also Stainless Steel, while the operating system is Apple Watch OS. The case material is Stainless Steel. This item falls under the categories of Cell Phones & Accessories and Smart Watches.