The cellular-capable watch has a red digital crown while the non-LTE version has a plain digital crown.[5] It has a built-in NFC chip which can be used for Apple Pay.[6] Apple claims 18 hours of battery life.[7] Each model of the Series 3 comes in a 38- or 42-millimeter body, with the larger size having a slightly larger screen and battery. It also includes ISO 22810:2010 water resistance (up to 50 meters) from the Apple Watch Series 2.[8]