In comparison, the hardware type is more complicated, more expensive and more stable. They often look like portable USB storage with a flash memory chip and electronic circuits inside. It can grab video signals transmitted between the PC and the monitor, and analyze the signals to make a judgment.Link (via Smart Mobs)
For example, when a player gets beaten by a monster and loses his health, the game shows that he is in a critical condition by showing a bar gauge on the monitor. When the reading goes down by a certain point, the auto-mouse notices it, and moves the character out of the danger zone. Then it makes the character regain his strength by drinking a magic potion or using a magic spell, before sending it to another battle.
It is practically impossible for outsiders to tell whether a human or a computer program is playing a game character. Also, it is not against Korean law to use a macro of an auto-mouse, as they do no damage to the game’s main server.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.