Premium robot maker Kärcher had a humble booth in a passage between two larger halls. Instead of going green, Kärcher decided to leave the signature yellow behind and went white. The whole booth was full of white versions of the well known yellow cleaners, including a little robot, the RC4000. The robot was originally announced a year ago, and it did not change a bit since that. In fact, it is exactly the same as the yellow RC3000, but in white, so no matter how much I like this robot, my visit at the Kärcher area was the shortest of all.