The waste goes out, up the conveyor belt and into the waste drawer. (geekwrapped.com)
The Litter Robot III includes an optional night light to assist older cats and a new indicator light to tell you when the waste drawer is full and needs to be emptied. (selfpetcare.com)
The only thing that happened to me once it was that the waste drawer was too full (it went almost 11 days without emptying) and the cleaning indicator showed blinking. (catfooddispensersreviews.com)