Q:What is the black box that monitors the camera connection?

DVR is usually used analog (DVR) and network (NVR) two, look at the interface behind the fuselage can distinguish. DVR according to a few video input will have several BNC input interface, NVR is not.

Q:Panasonic surveillance camera wv-cp704 / ch corresponding to which foreign models

2. Outside the network, then the first domain name under the first ping, whether normal, check whether the domain name

Q:Monitor the camera focal length 3.6mm 4mm 6mm. What is the meaning?

Mm is the lens of the aperture, the number of millimeters, not the bigger the better, the smaller the camera according to the wider picture, the larger the picture the more narrow the picture, the large number of millimeters of the lens is equivalent to the local zoom, The need to size, the size of the number of millimeters of the lens price is the same, there is a picture below you look at it to understand

Q:What is the difference between a camera's double point and a single lamp point?

Array infrared night vision technology, the essence or through the camera to launch active infrared light way night vision effect, but the use of advanced packaging technology, dozens of high-power, high efficiency of the infrared crystal package in a plane. The advent of this technology, access to the extraordinary rapid development.

Q:What kind of surveillance camera is good

The performance of the camera is mainly the minimum illumination (that is, the ability to adapt to the dark light), focal length (according to your workshop to install the camera position and to monitor the range of fixed focus, the shorter the shorter the focal length of the larger image is not very clear

Q:Infrared surveillance camera at night (no light) no picture and flash is how the matter

Check the time, pick the evening when people come close to the camera from the place to see if the infrared light is not activated, if the start, the infrared light will have a very weak red visible light is always bright. If there is no red visible light or not always bright, it can be basically the problem of infrared light. Of course, you also need to check whether the power is normal, if the voltage is low or the current is too small, it may cause the infrared light does not work.

Q:Camera gun 4MM, 6MM refers to what?

Camera gun parameters in the 4MM, 6MM, etc. refers to the camera is configured lens focal length.

Q:I would like to install at home and back door two cameras in general how much money?

There are dozens of front-end camera to tens of thousands of you so close to the video line can be SYV75-3, back-end with a collection card is also a few dozen to thousands of hard disk video recorder is from more than 300 to 10,000 or so.

Q:Surveillance video can only save 4 days (the original can save about 15 days), is not the hard disk video recorder is a problem?

You are not modified to save the format of the ~ !! You can choose to format the hard disk ~ !! Clear all the contents of the inside to see

Q:What kind of material is needed to install the surveillance camera?

3, each camera installed 12V transformer one. About 15-25 yuan / month