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I asked then a while back and got this answer.


In our testing it worked fine. We haven't tested it in all possible conditions yet but our initial round seems to show that it should work just fine. If you have any other questions feel free to let me know and I will be happy to assist you.

Kind Regards,
Justin
Griffin Technology
Customer Support

edit: Was 27/9 so maybe now it has been fully tested as it says compatible with 5s on their website now.
 
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