Monitor the camera, how much money one, the kind of video
Video capture card (then used on the computer): 150-300 range, this money a sub-goods. Project costs depends on how difficult you install the installation, if the wiring and installation is no difficulty, then the general is a 50 yuan a camera point, there are difficulties, you have to see the situation to install the situation. And then a video file to save the length of time and your computer's hard disk size has a relationship, because you provide a computer, this business is not responsible. If you want to save a long time, you can ask the business, how much hard disk, not the case, then add a hard disk on it.
20x4 = 80, camera power (outdoor): 25x4 = 100, auxiliary material (connector what little things): 50 wire you have to see your actual situation, and more use Flowers, less with less flowers
20 meters of infrared one machine, domestic Sharp Rui tablets, between 180-300, SONY Rui film, between 200-400, which means that night vision can reach 20, if you are not demanding on the night, but the day See it, it is cheaper, Sharp Rui film 150, SONY Rui film 180. Give you a price, do not require the price of night vision.