GeckoNav(tm) is another outstanding technology developed by Mr. Spencer and his team of engineers. This is what helps the robot to avoid objects. I have done research on this and have not found any other robot company in the world with this technology. They all use joy sticks for control. GOSY does not use any joy sticks with their robots. Here is the link to GeckoNav:

http://www.geckosystems.com/high_level/geckonav.php