Water resistance is not a permanent condition and can diminish over time.

However, Apple Watch SE should not be used for scuba diving, waterskiing, or other activities involving high-velocity water or submersion below shallow depth. This means that it may be used for shallow-water activities like swimming in a pool or ocean. Apple Watch SE has a water resistance rating of 50 meters under ISO standard 22810:2010.For additional information see /en-us/HT205000. However, Apple Watch Series 8 should not be used for scuba diving, waterskiing, or other activities involving high-velocity water or submersion below shallow depth. Apple Watch Series 8 has a water resistance rating of 50 meters under ISO standard 22810:2010.Tested against subsections for Altitude, High Temperature, Low Temperature, Temperature Shock, Immersion, Freeze/Thaw, Shock, and Vibration.Apple Watch Ultra is rated IP6X dust resistant.Apple Watch Series 8 is rated IP6X dust resistant.Battery life varies by use, configuration, cellular network, signal strength, and many other factors actual results will vary. Testing conducted by Apple in August 2022 using preproduction Apple Watch Ultra (GPS + Cellular) paired with an iPhone all devices tested with prerelease software. All-day battery life is based on the following use: 180 time checks, 180 notifications, 90 minutes of app use, and a 60-minute workout with music playback from Apple Watch via Bluetooth, over the course of 36 hours Apple Watch Ultra (GPS + Cellular) usage includes a total of 8 hours of LTE connection and 28 hours of connection to iPhone via Bluetooth over the course of 36 hours.Check /watch/cellular for participating wireless carriers and eligibility. Contact your service provider for more details. Wireless service plan required for cellular service. Not all features will be available if the Apple Watch is set up through Family Setup.If your iPhone isn’t nearby, your Apple Watch needs to be connected to a known Wi-Fi network and you must set up Wi-Fi Calling. To use Emergency SOS on an Apple Watch without cellular, your iPhone needs to be nearby. Apple Watch Ultra (Cellular), Apple Watch Series 8 (GPS + Cellular), and Apple Watch SE (GPS + Cellular) can use a cellular connection for Emergency SOS.The temperature sensing feature is not a medical device and not intended for use in medical diagnosis, treatment, or for any other medical purpose.

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