Is it necessary to install and debug the security monitoring system? Learn how much it usually costs a month
Technology, but not only do security companies generally, it should also include network cabling, system integration, and so on
If it is a small company, the salary may not be very high, but it will be very tired, you should understand this. If there is a large company specializing in doing this, the treatment of more than 3K bar (Wuhan, I have classmates do this), but business is inevitable.
