Here, the Litter-Robot 3 and 4 seem to be recorded incorrectly. The product described as the "black" colour variant is the LR4, the "grey" colour variant is the LR3. One more question about this: In the case of the LR3 (or the colour "grey"), the 90-day trial period during which the product can be returned is explicitly mentioned. For the LR4 ("Black"), this is not mentioned on the Galaxus page, although the manufacturer also actively promotes it for this model. Does Galaxus also include these 90 days for the LR4? This is relevant additional information, as 829 is a high price only to discover that your cats don't like the device.