Yes. eufy WetVac W31 supports vacuuming and mopping at the same time.

The difference is whether to use the water spray button to spray water. If water is not being sprayed, it is the vacuuming mode that is suitable for cleaning dust, hair, small particles, and other solid waste; If water is being sprayed, it is the mopping mode that is suitable for cleaning oil stains, stains, spilled milk coffee, etc. You can easily choose between the two modes according to your cleaning needs.

In order to prevent the rolling brush from being too dry and unable to clean the floor well, a small amount of water will be sprayed to moisten the rolling brush when the WetVac is first powered on. For more details, please refer to this article: Why does my WetVac W31 automatically dispense water when it powers on?