This is a great value little kit and works very well. It's good for practicing smd soldering and when finished and up and running makes a nice fun little spectrum analyser display. I made up 2 of these kits for a stereo display and mounted them behind some perspex. I also moved the LED colours around to make a more conventional green-blue-yellow-red display for each vertical strip.

This work exactly as described. It could show a strong sense of rhythm. Great!