I bought the meter to measure the sound pressure in my music corner slash recording studio. Among other things I was interested in how loud I have to adjust my listening boxes to get the same sound level as with my real piano "flesh and blood", when I'm playing on a virtual piano (VST instrument), and how much of this sound pressure area my ears at all. The unit can be securely mounted on standard photo telescope stand. This stand I then placed so that the meter was right next to my ear (once right, once to the left). Conveniently, the device has a button labeled MAX, which stores the sound level reached highest in the measurement. Now I know that I do not begrudge my ears at the piano up to 86 dB, and can adjust the mixer for the monitor speakers exactly the same in accordance with the (virtual). Since the meter is totally uncomplicated to use, I have of course also measured by how quiet it can be in my apartment (35 dB), which make a noise my cats when they are hungry (45 dB), and so on. Approved the device is probably not, so I would not take the absolute values literally, but described for an overview and for comparative measurements as above, it is always useful. Buy recommendation!