Great device

I received it in 14 days. The product is nice, but there should be a battery in the box, the battery did not come out and there is only a 100 micron test, you cannot experiment at another value. I asked the seller if it will hurt water and dust, I did not get an answer. I recommend

Thanks to the seller shipping very fast was received within 6 days, the device is initially excellent and the experience is underway to make sure the accuracy