"I would keep Hallmark a million miles away from that kind of card, " says Jack F.
Another player in this space is Square, which offers a tiny card reader that attaches to the audio jack on an Android, iPhone, iPad or iPod Touch and reads a card.
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Square's free Mobile Card Reader plugs into the headphone jack of an iPhone, iPad, or Android device.
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Detach the tablet from the dock, and you'll find the slate includes a microSD card slot, a 3.5mm headphone jack and a docking port that connects to the keyboard or the charging cable.
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Ericsson made some interesting accessories for the T28, like the "CHA-10 Chatboard" (a QWERTY keyboard for text messaging), the "MP3 hands-free kit HPM-10" (an MP3 player with an MMC card slot and standard 3.5mm headphone jack) and the aforementioned "Bluetooth phone adapter DBA-10".
The one on the right hides a USB port 2.0, a microSD card slot, and a 3.5mm headphone jack.
Similar products typically spin on the audio jack, causing misreads of the credit card and requiring the user to awkwardly hold the product in place while swiping.
The article reports that a company called Square has created a credit card reader that you can insert into the headphone jack of your iPhone, iPad, iPod Touch or Android phone.
There's a full-size SD card reader and a standard 3.5mm headphone jack (with mic support) on the left, plus the power input, HDMI output, USB 2.0 port, USB 3.0 connector and SIM slot (currently unused) in back.
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The card comes with a built-in speaker and a jack for headphones.
Not all the openings are hidden, though: on the notebook's right edge, you'll find a 3.5mm headphone jack, while the power button and memory card reader sit on the left.
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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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The left side of the slate houses a headphone jack, micro-HDMI connection, micro-USB 2.0 and a full-size SD card slot that lets you add up to 128GB of external storage (and theoretically more).
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