A:AnswerPlease check the spec for the two different devices you are requesting the information on as more than likely they are not the same exact model.
Debbie with Garmin
A:AnswerBands are changeable. You can order bands from Garmin or a third party vendor. The band that comes with the watch accommodates all wrist sizes.
A:AnswerIf your band is a participating financial institution it will work. If you swim in the ocean with it I recommend rinsing it afterwards and please be sure to not press any buttons while the watch is under water.
Debbie with Garmin