I have three stores that need to install surveillance equipment. I plan to use network hard disk video recorders and cameras to purchase and install the equipment myself. Please give me some advice f

I have three stores that need to install surveillance equipment. I plan to use network hard disk video recorders and cameras to purchase and install the equipment myself. Please give me some advice from friends who are familiar with security.

1. The installation does not depend on the size of the area, but also whether there are any installation blind spots in the store.

2. Use domestic cameras from Shenzhen.

3. The video recorder itself has a compression ratio. The space occupied by each camera per hour is an approximate value. You can consider using dynamic video recording. Recording in this way can save hard disk space

4. When installing it by yourself, you only need to connect the wires, and don’t connect the positive and negative poles of the camera incorrectly. Make the BNC connector nice to avoid short-circuiting the copper core inside and the shielding net outside, which will interfere with the image quality.

Nothing else at the moment, please ask if you have any questions.