The robot worked 2 times and has failed: it advanced more. Maytronics to change the engine and he was returned with a full roll out of its housing and the inside is broken. Really NOT SERIOUS! For a robot that had not a month of life, they do not want the shared me ... not very commercial. So I have a new robot ... and already damaged. I am very angry! I do not recommend at all this brand (Plus, they wanted me to pay the return transport 72)