The Apple Watch Series 3 models look practically identical to the models that came before them, but they are considerably more powerful internally. All Apple Watch Series 3 models have a faster processor and architecture than their predecessors and add GPS and GLONASS capabilities, a barometric altimeter, and Siri support.

The more powerful Apple Watch Series 3 devices, including this particular model, the Apple Watch Series 3 (GPS+Cellular, United States/Canada, A1861, 42 mm), also has wireless 3G capability, which means that it is capable of being connected to the Internet without a “tethered” iPhone and this line is the first Apple Watch series with that capability (although it only can be used on the same carrier as your iPhone).

Like earlier Apple Watch models, all Apple Watch Series 3 devices are controlled with a Force Touch capable display and a “Digital Crown,” but the cellular capable models add a red dot to the Digital Crown for easy collective identification.

This particular Apple Watch, the A1861 Series 3 GPS+Cellular model in the 42 mm size, features a 312×390 OLED screen with strengthened, lightweight “Ion-X glass” for configurations with 7000 series anodized aluminum housings and even stronger sapphire crystal for configurations with 316L stainless steel housings.

Battery life is an Apple estimated “up to 18 hours” overall, but more specifically “up to 3 hours” of talk time connected to an iPhone, “over 1 hour” connected to LTE, “up to 10 hours” of audio playback, “up to 10 hours” working out indoors, “up to 5 hours” working out outdoors with GPS, and “up to 4 hours” working out outdoors with GPS and LTE.

Please note that this A1861 Apple Watch Series 3 (GPS+Cellular, United States/Canada, 42 mm) model is compatible with LTE bands 2 (1900 MHz), 4 (AWS), 5 (850 MHz), 12 (700 MHz), 13 (700c MHz), 17 (700b MHz), 18 (800 MHz), 19 (800 MHz), 25 (1900 MHz), 26 (800 MHz), and 41 (TD 2500) as well as UMTS 800 MHz, 850 MHz, 1700 MHz, and 1900 MHz in the United States, Canada, and Puerto Rico (which last time we checked was part of the US). It is not intended to work in other countries.