No more freezing feet in front of the computer: here comes the USB (Universal Serial Bus) to your rescue! These slippers heat up using two USB connectors that you connect directly into your computer. Using the small electrical power supply of the USB, small elements keep your feet warm while you're on the computer.
The writer describes being surprised and amused by the thought of businessmen in formal suits wearing slippers at their desks- clearly s/he has not been to a Korean (or probably, Japanese) cubicle-farm.
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