This is a nice meter at a very good price. My only disappointment was no English instructions, but they can be found with an Internet search.

This is a nice meter at a very good price. My only disappointment was no English instructions, but they can be found with an Internet search.

This is a nice meter at a very good price. My only disappointment was no English instructions, but they can be found with an Internet search.

This device works but I do not know if the results are OK

This device works but I do not know if the results are OK

This device works but I do not know if the results are OK

First of all it works well and fast. Unbelievable for this low price. But it has some small issues in design of the casing and assembling. It should be delivered without battery, but it comes with a complete empty battery inside.(??) The lips for keeping the two parts of the casing together are so delicate, so tiny. If these lips are not already broken PLEASE be very careful when you put in the battery the first time. Once destroyed it will not close well. Two screws are keeping both halves together. The plastic attachments for these screws were broken. In the most clean air I can find the lowest reading is 42, the same as on the photos on the site. It looks like a bottom value. I think I have had just bad luck. I give just two stars for quality because of the items I mentioned. For the electronics itself and for how it works, it will be 5 stars at least.

First of all it works well and fast. Unbelievable for this low price. But it has some small issues in design of the casing and assembling. It should be delivered without battery, but it comes with a complete empty battery inside.(??) The lips for keeping the two parts of the casing together are so delicate, so tiny. If these lips are not already broken PLEASE be very careful when you put in the battery the first time. Once destroyed it will not close well. Two screws are keeping both halves together. The plastic attachments for these screws were broken. In the most clean air I can find the lowest reading is 42, the same as on the photos on the site. It looks like a bottom value. I think I have had just bad luck. I give just two stars for quality because of the items I mentioned. For the electronics itself and for how it works, it will be 5 stars at least.

First of all it works well and fast. Unbelievable for this low price. But it has some small issues in design of the casing and assembling. It should be delivered without battery, but it comes with a complete empty battery inside.(??) The lips for keeping the two parts of the casing together are so delicate, so tiny. If these lips are not already broken PLEASE be very careful when you put in the battery the first time. Once destroyed it will not close well. Two screws are keeping both halves together. The plastic attachments for these screws were broken. In the most clean air I can find the lowest reading is 42, the same as on the photos on the site. It looks like a bottom value. I think I have had just bad luck. I give just two stars for quality because of the items I mentioned. For the electronics itself and for how it works, it will be 5 stars at least.