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The IoT Litterbox and Other Gadgets From the MWC in Barcelona

Robots that can thread needles and play pianos, 5G smartphones that fold in half, and cat litter trays that alert owners about how many times an animal has visited. These are just some of the more memorable sights from MWC Barcelona 2019, one of the biggest annual tech shows in Europe.

Although next-generation 5G wireless technology was the overarching theme of the show, it’s hard to illustrate — 5G radio waves are invisible, after all. So companies from around the globe tried their best to showcase what the new wireless standard would make possible, from the sublime to the downright suspicious.