Meta CEO Mark Zuckerberg on Wednesday introduced a new piece of hardware as his company tries to expand beyond social media: a wristband that he said can detect subtle hand gestures and control the features on a pair of smart glasses. Zuckerberg debuted the wristband at Meta Connect , a company-sponsored tech conference. And while the wristband appeared nondescript, he said on stage that he was using it in combination with a pair of $799 smart glasses to send text messages surreptitiously without touching a smartphone.

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