iRobot - Cliff detection sensor helps #Roomba e5 to avoid falling down stairs and other dangerous drop-offs. Learn more about the Wi-Fi connected, Alexa integrated smart robotic vacuum cleaner: https://irobot .in/Introducing-Roomba-e5.aspx | Facebook
Will Roomba Fall Down Stairs? [Not Really But...]
Best Buy: iRobot Roomba 650 Self-Charging Robot Vacuum Black R650020