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Recently, when I visited the mall, have you always seen square screens hanging at the elevator entrances and corners of the corridor? Some are broadcasting promotional information, while others are displaying surveillance screens. This LED monitoring screen that can be used for both advertising and security has now become a standard equipment in the mall. But the problem is - eight out of ten bosses who want to install such screens...
Have you ever experienced the shock in the surveillance room? Last month, Lao Zhang, a security guard in a community, complained to me that the 6 surveillance screens suddenly broke down while on duty. After retrieving the video, he found that the screen power supply module was burned. Where should I buy such a fatal device? Today we will talk about it - from electronic city stalls to mysterious manufacturers, these tricks are comparable to those of the...
Alas, recently a friend asked me: "Where should I buy this small LED surveillance screen? "To be honest, when I first came across this thing, I was confused - there were so many products on the market like instant noodles on supermarket shelves, with prices ranging from hundreds to tens of thousands, which made people confused. Today we will break it apart...
Alas, have you ever thought about why the surveillance screens with red light in chemical plants will not explode in high temperature and high pressure environments? Last year, a friend who was in the mining industry suffered a great loss. He bought an ordinary LED screen to install it in a mine with a cheap price. As a result, the equipment was short-circuited and sparked, which almost caused an accident... Today we will talk about this explosion-proof surveillance...