CES 2019: Wristband 'can control' your body temperature

BBC Click's Nick Kwek goes into sub-zero temperatures to test a wristband that can warm you up.

The Embr Wave wristband is said to act like a personal air conditioning unit using a thermal electric module to that acts like a heater.

The manufacturers say it can vary your body temperature by up to five degrees. Nick puts it to the test in a cold environment and then in a hot tub.

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