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The first version of the Litter Robot became available in April 2000. In October 2006 the Litter Robot II was released, incorporating many new features requested by users, such as a larger storage compartment, "pinch guards" that stop the action if the cat interferes with the globe, a sliding guard door to keep cats from accessing the globe without the step, quieter operation, and sealing the electronics in the base for easier cleaning.
Dimensions and Requirements
Overall Dimensions are 29 in (H), 22 in (W), 24 in (D). The waste drawer is 11 in (W), 16 in (L), 6 in (D). The oval shaped entry opening for the cat is 9 in (H), 6 ½ in (W). The litter bed area measures 14 inch across at maximum litter capacity. There is 13 to 15 inches of head room for the cat inside the globe depending on the level of litter. The inside width is 20 inches across at the widest point, and depth is 15 inches front to back.