Q:3.6mm and 6mm surveillance camera can see the screen angle is how much

3.6MM angle is generally about 87 degrees 6MM angle is 60 degrees. The scope of the monitoring is not the same, a clear distance is not the same, 3.6MM lens is generally the best clear distance of 7-8 m 6MM lens the best clear distance of 15 meters 3.6mm: 90 ° about 6mm: 60 ° 8mm: 45 ° about 12mm: 35 ° or so

Q:Does the infrared surveillance camera automatically alarm when someone enters the monitoring range?

The camera itself does not work, through the acquisition card, or hard disk video recorder, you can detect the mobile body will alarm,

Q:Install the monitor camera need to put a few lines

A fixed-focus camera requires two lines, one video cable (from the recorder to the camera), a power cord (from the recorder to the camera, or the nearest socket can also be).

Q:Monitor how the camera looks online

Monitoring the camera through the Internet to see, you must upload real-time data on the Internet. For example: small degree i eyes and ears

Q:Monitor video recorder, how do two video recorders show a display? Video recorder can not be connected with the exchange of two video recorders

Each network hard disk video recorder then a display, a small shop, then buy dozens of pieces of a 2 VGA (HDMI) distributor, anytime, anywhere landing, or camera manufacturers to provide DDNS domain name, buy dozens of pieces of wireless Router, you can also set up, no need to specifically buy a monitor, a computer can see, and analog camera can be the same usage.

Q:Is there a surveillance camera that can be plugged in

Hello there. This ... ... just a few words it There is a charge, there are external power supply. You are good landlord ~ ~ very happy to answer this question

Q:Monitor the farthest distance from the camera can be far, which manufacturers out

The effective distance of the surveillance camera is determined by the lens focal length used, and there is no direct relationship with the manufacturer. Surveillance cameras on the market effective monitoring distance is generally in the five meters to 150 meters.

Q:Monitor the camera's focal length 4 meters good or 8 meters good

Showing the shooting of the smaller the object, looking very far feeling. The larger the number, the shooting angle is small, shooting the display of the object is closer, look bigger.

Q:Monitor camera lens 4-6-8-12-16MM difference.

4 of 3-4 meters wide angle of 45 degrees, 6 of 6-8 meters wide angle of 38 angle, 8 of 8-12 meters wide angle of 35 degrees, 12 of 12-15 meters wide angle of 30 degrees, 16 of 20 meters / wide angle 27-28 degrees,

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?

Under normal circumstances is not the problem, is not you debugging the camera, changed the size of the video image?