These are the automatic litter boxes which have a conveyor and do the job magnificently perfectly being an escalator that can help to carry the clumps and waste to easily dump into the dedicated receptacle or waste compartment/chamber. So what are the downsides? This is the Smaller automatic litter box. https://raymondvdlrw.blogthisbiz.com/44156045/the-5-second-trick-for-automatic-litter-box