Height

My couch has 5 inch legs. This unit will fit but the sensors seem to only let it skirt the couch??
What height will it take to go under couch and clean??

Hi,
Standards vary between models. For devices whose radar cannot automatically retract, the bottom height should be at least 5 cm higher than the device's collision sensors. If your device cannot clean, please provide the device model and a picture of the actual scenario.

The model is the ultra 20 I have attached the order information .