Cellular keeps you connected with just your watch (2)GPS and a barometric altimeter track how far and high you goDual-core processor for faster app performance (3)Ultimate sports watch and intelligent activity trackerSwimproof so you’re always ready for the pool or ocean (4)watchOS 4 is even more intuitive and intelligent1. Apple Music requires a subscription2. Wireless service plan required for cellular service. Apple Watch and iPhone service provider must be the same. Not available with all service providers. Not all service providers support enterprise accounts; check with your employer and service provider. Some legacy plans may not be compatible. Prepaid plans are not supported. Coverage dependent on carrier network. Roaming is not available outside your carrier network coverage area. Contact your service provider for more details. Check www.apple.com/watch/cellular for participating wireless carriers and eligibility. 3. Compared with previous generation4. ISO standard 22810:2010. Appropriate for shallow-water activities like swimming. Submersion below shallow depth and high-velocity water activities not recommended. Milanese Loop bands are not water resistant.