New technology transmits data through the human body

From Newlaunches.com:

At the Next Generation Computing Show 2006 in Korea ETRI technologies showcased the Wrist Information device which functions on BAN (Body Area technology). It is basically a PDA to be worn on your wrist and it uses the body as a medium to transmit data to compatible devices. For eg - You have worked on a word document on the Wrist Information device and you need a print out, so all you do is give the print command on the device and touch a compatible printer and the data is transmitted from the device to the printer via your body. Though still in development stage the technology looks very promising.

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