During the exam, how to ensure that the shielding device is normal and useful and can achieve the shielding effect is very important. When many people buy test shields, they often buy shields at different prices. How can they be judged? Is it worth so much?
First, let's popularize the relationship between price and power. The shield is divided into low power, medium power and high power.
Low power, that is to say within 2W, this 2W refers to 2W per channel. If it is 8 channels, the cell phone jammer is also 16W. This is suitable for home use, small meeting rooms, etc., generally within 15 square meters.
Medium power refers to between 2W-4W. If each channel is 4W, 8 channels are 32W. This may generally be counted as medium power. This is suitable for examination rooms, gas stations, etc. Generally, the shielding area will be relatively large.
High power refers to more than 5W, if it is 8-channel, it means that the machine is more than 40W. This power is very large. Applicable factories, etc.
Now on the market, many fake power machines are generally powered by 5V, which is also written as 24W or 36W. This means that your car originally drove with a displacement of 1.0, but in the advertisement, you just wrote it with a displacement of 3.0. From the perspective of consumption capital, the larger the displacement, the higher the cost performance.
What is the relationship between power and the price of the jammer?
1. It depends on the actual power? For each power, the corresponding electronic components are different. Especially for some high-power products, electronic components will be very expensive to achieve that effect.
2. How much volt power supply depends on? Just like, if you are a 1.0 displacement car, your power is the same. If it is 5v power supply, it will be very difficult to achieve 24w or 36w.
3. Look at the shell. Is it a metal shell, a hardware shell or an aluminum alloy shell. Different shells and molds have different prices.
4. A little more detail, just look at the design of each module. Generally, manufacturers use the same module, change a shell, and make shields with different powers.