I think that the US science fiction film in the spacecraft on the automatic door now there?
Do you care about that?
Do you want to install this door for your toilet?
Yes, many places have used Kazakhstan
(Infrared is also a kind of light, but our eyes can not see, it works is the light reflection, when there is no moving object it has been received to reflect the light back is the same When there is a moving item that blocks its light, the degree of reflection of the light changes, it will react to the control of the system to make the action will also automatically open the door.
