PET MARVEL C1 self-cleaning cat litter box is designed with cats in mind, featuring an open design with a spacious 67.5L interior that balances comfort and privacy. This scoop-free machine might be the best automatic litter box for large and multiple cats. C1 is equipped with an FS composite bio-enzyme deodorizing module. By breaking down the urea and uric acid in cat urine through protein decomposition, an amazing effect of zero odor is achieved. The waste bin uses a contactless drawstring semi-auto-pack design to enhance odor control effectiveness.