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Compact, convenient, simple test, easy to compare, not open to the use of the General Assembly.
The recording pen is good, buy it to the unit, everybody said!
Start to use, the noise is still large, mainly the distance from near sound is recorded.
I bought it for my wife. I haven't opened it yet. My wife is very fond of it.
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I hope the first time we have received good goods, the issue inspection should be strengthened.