The sleek, durable design incorporates a certified portable secure element embedded into the microNFC card enabling the phone for payments.

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It feeds into a small computer with a video-input card that in turn sends the digitized signal via phone line to Deits' server.

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Square launched in 2009 as a way for people to take credit-card payments by swiping cards in a small plastic reader that plugs into the headphone jack of a cell phone.

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