Property me the part bought because I want to measure times in my kindergarten class, where volumes are exposed we educators.
Device is working properly and is clean and well calibrated! This was demonstrated by a comparison with another device, which is officially verified.
The handling is a breeze and the device is working properly. It measures 30-130 decibels and even in poor lighting conditions, thanks to an additional sensor, a background display which switches on in addition itself.
I can only recommend the device. Who wants to bring any scientific theses, thus generated, is well served by low-cost device !!!
Full 5 stars from me!