A:AnswerI assume it can be used across multiple products as long as you have the quick mount adapter. However I wouldn't recommend it, this product is very poorly designed and not made for an active lifestyle.
A:AnswerIf you notice the center of the armband it is a bit square? Well there is an attachment that it comes with that sticks to the back of your phone case where you can just attach it to the arm band. That attachment also works with the car mount and bike mount as well. Hope that helps!