I KNOOWW!! you plug it in. no kidding.
what I want to know is HOW does this thing actually work... how do you input data through a headphone jack?
On Paypals site, it says a microphone enabled phone is required... OK... so does the reader read the card, and then send encrypted tones to the microphone to be decoded like dial up internet?
Then what is the headphone jack for, power? how does the card reader get juice?
Driving me crazy that I cannot find a single site that actually explains it. They all just explain how to use them... is this what our world is coming to? dont worry how it works just trust it?
this is what im talking about- https://www.paypal.com/webapps/mpp/credit-card-reader