Camera
Q:	What is PAL,NTSC,SECAM ??
A:	The above three kinds of nouns are that three major TVs existing in the whole world at present broadcast systematic specification . Different systematic films are unable to be shown on other two kinds of specifications ! So should look out the system of camera from foreign countries while purchasing camera
Q:	What kind of camera can be divided according wiht its feature ?
A:	Generally speaking, it can separate from 3 types 1.Box camera: Box camera need to add lens, you should chose different lens from different enviroment. 2.Dome camera: Dome camera has included the len, it is suit for elevator or office, etc.. 3.All in one camera: it is built-in auto focus and providing embedded precision technology. HS-CC755 has outstanding compact design, innovation, and excellent picture quality.