Uploaded April 2026 | Updated September 2026, 2 weeks ago

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Checkout the Dreame vacuum here:
AMZ Link：https://dreame.shopping/4rQjN56
Official store link：https://dreame.shopping/4bxUzCm

@Dreame 【youtube.com/@Dreame_us/videos】
#dreame #dreameX60Ultra#dreameX60MaxUltra #dreameflagship#dreamerobotvacuum #nextgenrobotvacuum

See the paper published about this hourglass effect: dx.doi.org/10.1119/1.14321