The Banryu home robot ("banryu" literally means "guard-dragon") from tmsuk and Sanyo Electric is the latest thing in home robotic defense. The Banryu guard-dragon moves on all fours through your home, keeping an eye on things. Not only can Banryu keep a look-out, it can also sniff the air. If it detects motion or the smell of burning objects, it can immediately call your cellphone to let you know and show you the problem.