... sensor mould BLJ-ME001ABrief introduction:BLJ-ME001A is a type of reflex infrared sensors controller, which ... bell, corridor, the alarm of watching TV in a short way,automatic door, the advertising light box ... off the computer screen automatically when operate at a short distance, and so on. We also ... show the detection distance longer when you are wearing a light-coloured clothes(white, yellow and so on ...