Those who know mobile phones come in N95, and those who know mobile phones come in N

It seems to be a few hundred dollars more expensive.

At least half price for 2 lots9 into new 1500+

It is better not to dismantle the machine. If you can return it, return it.

There will be many problems in the future. And you have to try the functions when you get the machine. For example, Bluetooth. GPS or something.

The serial number was changed because the machine was flashed. It is a refurbished machine. 2 hands are very common.

It may also be a black product. It's stealing, snatching, and so on...

It is highly recommended to return if you can.

Tell you for sure. Scammed. And **too high.

There's no need to spend that money for N95.

Buy a new license, which is safe and easy to use.

Of course, I was deceived, maybe it's an assembly machine that is a machine assembled from other waste machine parts.

There must be a problem with parallel goods that have been reloaded, but since there is no problem, use it.

It feels a bit expensive The N95 is not very new.

But it doesn't seem like a big problem.

Congratulations, you have bought the legendary board machine, that is, the refurbished machine.

It can only mean that the motherboard and shell of the machine are not the original.

To not necessarily have a quality problem.

If it's okay for three days, it's fine.

Isn't it okay if the new machine is okay for three days?

Isn't the licensed goods only guaranteed for 7 days?

2. Mobile phones: If the mobile phone is dismantled, it is worthless. Generally, it will not be demolished, except for those that have been repaired. You've been deceived.

The main differences between KN95 and N95 are as follows:

1. The standards are different: KN95 is the Chinese standard GB2626-2006, and N95 is the American NIOSH-42CFR Part 84.

2. The Chinese name is different: the Chinese name of KN95 is KN95 particulate matter protective mask, and the Chinese name of N95 is N95 medical protective mask.

3. Different use scenarios: KN95 is suitable for use in high-density public places and high-risk environments, while N95 is mostly used for medical staff.

To put it simply, these two masks are two sides of the same coin, belonging to the same kind of mask, but the name is different, and the certification standards are different, one is a domestic standard, and the other is a foreign standard. Ingress protection.

Exactly the same, there is no difference in the protection effect.

N95 masks.

KN95 mask is China's national standard GB2626-2006 classification of anti-particulate masks, from August 1, 2009 implementation of the national standard GB2626-2006 "respiratory protective equipment self-priming filter anti-particulate matter respirator" dust masks are divided into three levels: KN90, KN95, KN100.

KN95 mask.

N95 mask refers to one of the anti-particulate masks certified by NIOSH (American Institute for Occupational Safety and Health), "N" refers to non-oily suspended particulate matter that can be protected, usually non-oily particulate matter refers to coal dust, cement dust, acid mist, microorganisms, etc., as well as talking or coughing.

The droplets are also non-oily. "95" refers to a class of masks that filter these non-oily particles with an efficiency of 95%. As long as it meets the N95 standard and passes the NIOSH review in the United States, it can be called an "N95 type mask."

Now there are N95 masks and KN95 masks on the Internet, many people will confuse these two kinds of masks, thinking that the protective effect is the same, in fact, there are some differences, N95 is a medical-grade mask, and the implementation standard is GB19083-2010, which is a real epidemic prevention mask, and N95 is also the best protective effect among many types of masks. It can effectively block aerosols, viruses, bacteria, dust, body fluids and blood, etc. KN95 is a non-medical mask, I don't believe you can take a look at the outer packaging box of your KN95 mask, there will be marking.

To be precise, KN95 is a civil grade or industrial grade, and the implementation standard is GB2626-2019, which is generally used to prevent droplets, dust particles, etc.

Standards and processes are different.

The difference between KN95 and N95 masks is that N95 is the standard of the United States, and KN95 is our Chinese standard, which means that it has at least 95% filtration efficiency for non-oily particulate matter aerosols, so it is because of the difference in this standard and process that the difference between KN95 and N95 is caused.

When buying N95 masks, many people did not pay attention to the details and bought "KN95 masks". Usually "KN95 masks" are much cheaper than "N95 masks". "KN95 mask" refers to a mask that meets China's national mandatory standards, and from the perspective of particle filtration effect, "KN95 mask" and "N95 mask" are the same.

Mask features:

1.Medical Protective Masks: Comply with China GB 19083-2010 mandatory standards, filtration efficiency 95% (using non-oily particulate matter test). Synthetic blood penetration test (to prevent splashing of body fluids) is required to meet microbiological indicators.

2.N95 mask: NIOSH certified, 95% filtration efficiency for non-oily particulate matter.

3.KN95 mask: Meets the mandatory standard of China GB 2626, and has a filtration efficiency of 95% for non-oily particulate matter.