The ECG app is available with the latest versions of iOS and watchOS on Apple Watch Series 4 or later. See apple.com/hk/en/watch for compatibility details. The ECG app is not intended for use by people under 22 years old.

1GB = 1 billion bytes; actual formatted capacity less.

Battery life varies by use and configuration; actual results will vary. See www.apple.com/hk/en/batteries and www.apple.com/hk/en/watch/battery.html for more information.

Apple Watch Series 5 has a water resistance rating of 50 meters under ISO standard 22810:2010. This means that it may be used for shallow-water activities like swimming in a pool or ocean. However, Apple Watch Series 5 should not be used for scuba diving, waterskiing, or other activities involving high-velocity water or submersion below shallow depth.

Apple Music requires a subscription.

Some bands are sold separately. Some features are not available in all regions or all languages.

Apple Watch Series 5 requires an iPhone 6s or later with iOS 13 or later. Wireless service plan required for cellular service. Apple Watch and iPhone service provider must be the same. Not all service providers support enterprise accounts; check with your employer and service provider. Roaming is not available outside your carrier network coverage area. Contact your service provider for more details. Check apple.com/hk/en/watch/cellular for participating wireless carriers and eligibility.

To learn more about wearing Apple Watch, getting a good fit, potential skin sensitivity, and proper care and cleaning, click here.