Tips: Grab a crystal head, and then bump up and down in your hand. If there is a crisp sound, it means that the material it uses is better; if the sound is dull, it means that its quality is relatively poor.

       The second step to observe the appearance is to check the shape of its crystal head. Because the size of the crystal head is strictly regulated, we can connect the crystal head with other devices (network cards, switches, etc.) with other RJ-45 ports. The plastic shot film cannot remove the crystal head, which shows that its specifications are relatively accurate. On the contrary, there is a clear gap after connection. It can be removed by a gently, indicating that its production process is not closed and there is a quality problem.

       The second trick: judge authentic

       The most important part of the crystal head is the top copper piece, and the quality of its quality directly affects the quality of the crystal head. When checking the copper sheet, first check the cutting edges of the metal terminal part neatly. Because inferior products are definitely not closed in the production process, there will be a lot of metal burrs when observing in a magnifying glass; in addition, from the color point of view, the color of the good crystal head copper tablets should be golden yellow, and the inferior products are different due to the different materials used. There will be a situation where the surface becomes dark after oxidation.

       In addition, we can bring a small blade in the actual purchase process. There are two effects of blade. One is to use the metal contact piece of the crystal head with a blade. If the copper above can be easily included, and the color inside is relatively dark, it must be false; It is difficult to scrape it. Even if there is a little part of the part, the metal contacts exposed in the observation are shiny; the other role is to try to use the tip of the knife to leverage the metal terminal. Generally speaking It is difficult to pry it out, and the counterfeit crystal head production is irregular, and it may fall lightly.