The clue is in the name: it's a vacuum cleaner specifically designed for cleaning cars. The main body of such a cleaner could easily be mistaken for a handheld vacuum. It's compact and usually features only two or three settings.
Accessories such as the extension hose, brush head and car charger that usually  accompany a car vacuum such as the eufy Clean H20 as standard confirm that the primary use of a this type of appliance is for the car.