There are many spies in every corner of a building. It is mini wireless camera or well-known as CCTV. Its function is to spy and record the event in all rooms. Then the data is sent to the receiver in control room. This is a way to catch unwanted people or events that are distrusted and even this tool is a compulsory for public building to avoid terrorism issue.
There are many models of wireless cameras with its special specification depending on its price. As whole, it is presented in cute package as same as a matchstick box. It is simple and light so that easily to operate it. We can find it at supermarket, department store, baby sitter house, private house, and office. This wireless camera can catch image until 150 meters. This tool is suitable for surveillance. It can connect to television and PC with additional device TV Tuner. It has simple operation menu and no need to install software. It is sold out in range of price $ 10 to $ 100.
The wireless camera works by first catching the objects then sending it to the receiver by using wireless video transmitter. It also can deliver by infrared. Simple features are CCTV camera with CCD sensor, TV Color System PAL / NTSC, Validity Pixel PAL – 628×582, NTSC – 510×492, Horizontal Definition: 380 TV-Lines, and RF output. Some wireless camera has high specifications supported by expensive price are use CMOS colour camera as the camera sensor results picture format JPEG with the picture pixel 640 x 480 and video format AVI with the video pixel 320 x 240 which can be saved in available expansion slot SD 128 MB.
Mean while the features of the receiver are use small power consumption 1.2W and Voltage 9-12V DC by adaptor. Operation Frequency 1.2-2.4 GHz, Audio/Video RCA Jack Output which is compatible with all television kinds, surveillance monitor, and VCR. Its weight is about 100-400 gram.
Besides of its supporting specification in high quality, however wireless cameras just can be applied for certain place and it must be planted in the proper side. We cannot move it in nearly close time. It means we need a lot of devices if we have many rooms to be spied. Despite what a small it is, some people still can know its location but there are many of them don’t know if they are spied from the corner wireless cameras.
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