The Apple Watch Series 5 is a smartwatch designed and developed by Apple Inc. It was first announced on September 10, 2019 and was released on September 20, 2019. It is the fifth generation of the Apple Watch, succeeding the Series 4. The Series 5 features a larger display with a always-on retina display, which allows the watch face to remain visible at all times. It also includes a new ceramic and sapphire crystal back, which improves cellular and GPS performance. Additionally, it has an improved processor, the S5, which is up to two times faster than the previous generation. The Series 5 also includes new features such as a built-in compass, an ECG sensor, and a fall detection sensor. It also has a noise alerts feature, which notifies the user when the ambient sound around them reaches a level that could damage their hearing.