What is apple watch 3 38mm?

The Apple Watch Series 3 (38mm) is a smartwatch produced by Apple Inc. It was released in September 2017 and features a 1.3 inch OLED display with a resolution of 272 x 340 pixels. The watch is powered by Apple's S3 chip and has 8GB of storage. It is water-resistant up to 50 meters and has a built-in heart rate monitor, accelerometer, and gyroscope. It also features GPS and supports wireless connectivity through Bluetooth and Wi-Fi. The watch runs watchOS 4.0 and is compatible with iOS 11 or later. The battery life of the watch is around 18 hours with typical usage. The Apple Watch Series 3 is available in two models - one with cellular connectivity and the other without cellular connectivity.