Posted by a reviewer on Amazon

If you like you can switch to mic mode where device will listen to any sound and output the spectrum wave it also seems to respond via 3

Posted by a reviewer on Amazon

Plus it makes it a pain to use my laptop for other measurements or to change my everevolving component list for that project

Posted by a reviewer on Amazon

So far i love them but i had to adjust my thinking to the way they display the frequency band

Posted by a reviewer on Amazon

Normal audio spectrum analyzers use a logarithmic scale which shows a lot of detail in the lowtomid frequencies but compresses the entire highfrequency range into about 14 of the chart smashed against the right edge

Posted by a reviewer on Amazon

These led displays seem to be using a linear scale which spreads the entire frequency spectrum evenly across the entire display

Posted by a reviewer on Amazon

Keep in mind that the columns of leds are not labeled in any way

Posted by a reviewer on Amazon

So you have to figure out the frequencies on your own

Posted by a reviewer on Amazon

Another pleasant surprise was the fact that in addition to the usual chinese instruction sheet they tossed a quite usable english instruction sheet into the box