Meet Ascender, the first robot vacuum that is able to clean your stairs
A Stair-Climbing Robot Vacuum - Core77
Amazon.com - SereneLife Robot Automatic Vacuum Cleaner - Upgraded Lithium Battery 90 Min Run Time - Bot Self Detects Stairs Pet Hair Allergies Friendly Home Cleaning for Carpet Hardwood Floor - PUCRC26B, Black -
iRobot Roomba J7 7150 Robot Vacuum with Smart Mapping, Identifies and avoids obstacles like pet waste & cords j715020 - The Home Depot