The Apple Watch Series 3 models looked identical to the Apple Watch models before them (original, Series 1, and Series 2), were available in the same sizes (38 mm and 42 mm), but were more powerful. The Series 3 had a faster processor, GPS, a barometric altimeter, and Siri support. This Apple Watch Series 3 is a Space Gray, 42 mm model.
The Series 3 Apple watch was the first to offer cellular service as an option, although this model is the GPS-only version. Apple described the Series 3 Watch in a press release:
“The third-generation Apple Watch is an amazing health and fitness companion with intelligent coaching features, water resistance 50 meters and a new barometric altimeter that measures relative elevation. Apple Watch Series 3 comes in two models, one with GPS and cellular, and one with GPS, both featuring a 70 percent faster dual-core processor and new wireless chip.”
This Apple Watch had a 312×390 OLED screen with Ion-X glass and a 7000 series anodized aluminum housing. Apple estimated the battery life at “up to 18 hours.”
The Apple Watch Series 3 used Apple’s S3 processor, “which allows for quicker app launch times and smoother graphics, and, for the first time, enables Siri to speak using the built-in speaker.” It also included a new W2 wireless chip that made Wi-Fi 85% faster and Bluetooth and Wi-Fi 50% more power efficient. The watch shipped with watchOS 4.