This one is free.
Just need an iphone for it. 
.. which she can also use in case of emergency while jogging.
You don't want the battery and the case to be bulky and heavy. or It's going to be a drag to use it.
This one is free.
Just need an iphone for it. .. which she can also use in case of emergency while jogging.
You don't want the battery and the case to be bulky and heavy. or It's going to be a drag to use it.