So far I have 1 card tucked in the bottom of my young sons backpack to make sure his mom and I know where he is while on his way home from school, his mom thought it was an amazing card to be so discrete she was 1,000% on board with it , I have 1 card in my wallet and the 3rd card will be going in my carry-on suitcase as I travel often, thank you again for this amazing GPS card, sincerely, Robert