The Litter-Robot 4, a self-cleaning litter box from Litter-Robot, significantly reduces odours, but it does not guarantee a completely odour-free environment.

- The litter tray has an automatic cleaning function that directs faeces and urine into a separate chamber, which minimises odours.
- However, there is no guarantee that there will be no odours at all, especially if the chamber is not emptied regularly or if the litter tray is not properly maintained.

For optimal odour control, it is important to follow the manufacturer's instructions regarding maintenance and replacement of filters or other components.