Vacuum cleaner robot - Roborock S4 robot

I'm selling a vacuum cleaner robot - Roborock s4. It was acquired by me on Dec 2020. It has some usage marks but it is fully functional and nothing is broken. It comes with the original box and the manuals. Additionally, I'll be sending a new filter as well. It always worked great for me. I'm just selling it because I got a new one which features a mope.