CCD (charge coupled device) and CMOS (complementary metal oxide semiconductor) image sensors are two different technologies for capturing images digitally.

CCD in video cameras is usually measured by physical size. Most security cameras may have CCD 1/3 of an inch in size or larger. The larger the sensor, the more light it can capture, meaning it will produce better video in low light settings.

So CCD image sensor could provide better picture quality than CMOS. But because of the better quality, the price of CCD product is higher.

2. What is Horizontal Resolution?
Horizontal Resolution refers to number of equally spaced vertical black-to-white or white-to-black transitions that the camera is able to reproduce, divided by the aspect ratio (usually 4:3) to make a comparison between horizontal and vertical resolution easier. Usually expressed as TV lines per picture height. The higher horizontal resolution means better picture quality.

3. What is LUX?
Lux is often given as a technical specification for cameras to describe the lowest level of light required for the camera to produce any kind of an image. This is important if you need the cameras to see in low light.
The Lux is lower; the image can be seen more easily in the dark

 

4. What is Illumination?
That’s, a scene presents different colors, surfaces and materials that reflect varying amounts of light. Before selecting equipment, one should determine the minimum light level that will arrive from the scene to the camera lens.
The minimum illumination means that the darkest environment which camera could take normal picture.

5. What is the difference between weatherproof and waterproof?
Weather-proof means the camera could resist wind, rain, dust, and other normal weather conditions. So the weather-proof cameras could be installed outdoor.

While, Water proof means the camera could work normally in water.

 

6. What is difference between wired and wireless camera?
1) A wired camera needs a cable to connect the camera to a TV or VCR to see the image or hear the voice.  All wired camera must use RCA cable to connect the camera to the TV and VCR.

However, the wireless camera doesn’t need. The AV cable can be connected between the receiver and the TV, while the camera can be put everywhere within 100M (Without any block).

2) Wireless camera can be installed more easily than wired camera.

3) Wired camera are not with interference but as wireless camera is transmitted by analog signals, it will be with interference sometimes.

 

7. What is the difference between 1.2G and 2.4G wireless camera?

 1) 1.2G products are not permitted by law of EEC countries, and they can't get CE approval. But 2.4G products can. So to get the CE approval, we have to make a better quality and use better materials and better product examination. So the cost is very different. 
 2) 1.2 G products can have 1 channel only , and controlled by tuner. 2.4G products are with fixed channel and more stable, which can have 4 channels to avoid interference, and one receiver can support 4 cameras max at the same time.
 3) 2.4G products with CE approval, which have a limited output power, less than 10 mW. This is very important to body health. Because 1.2G microwave is not good for people's health, especially for big power transmit.  But for 2.4 G product, that's much better, in a word, more green!
 4) 2.4G products' transmitting distance is longer than 1.2G products
  All in all, 2.4G products are the trend for market.

 

8. Do the wireless cameras and transmitters provide encryption?

No, our wireless cameras and transmitters do not send encrypted audio/video.

In order for somebody else to receive audio/video from your transmitter they will need to have a wireless receiver set to the same channel within range of the transmitter (700 ft. maximum). The chance of this happening is very rare.