A startup called Migo Robotics claims to have developed a robot vacuum that can climb stairs. The Migo Ascender, as it’s called, also reportedly has mopping functionality.
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It’s fun to see the physical solution they’ve developed to enable the thing to climb:
The company says the Ascender is estimated to ship this August, and will retail for $1,400; they’re offering it for $1,000 if you sign up early at the link above.
Perhaps worth noting: Nowhere on their website do they say the thing can descend stairs.
Source: core77