Let me start by saying that I am a professional audio engineer and dB meters are essential. It has 2 things that make it different from everyone else. It accepts AAA batteries. 9V works for a lot of people, for me the only thing I had was my dB meter. Now that I have this, I can only narrow myself down to two types of batteries. It has a full measurement range of 30-130 dB. I don't have to limit myself to 20 dB steps like most others in this price range. I can see the entire range which is very useful for things like music as I can switch from quiet to loud very quickly and need to know how quiet and how loud I was working. /C, fast/slow,
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