1. input signal level accepted from 200mV to 4V which means your iPod, PC/Notebook average audio card, pre-amp, etc.
2. the analyzer is stand-alone, it needs just power & audio signal
3. the microcontroller is pre-programmed in both assembled and unassembled versions (unassembled version does not receive warranty)
4. I'm attaching some pictures of V2 in this post. More pictures on their way and a new youtube HD video. I just need to get some time to edit it before uploading.
I already have a new video on youtube about the assembly process of V2:http://www.youtube.com/watch?v=3R-xmB1YDqU
I'm also attaching the user guide for V2 where you can find more info.
Let me know if there's anything else you would like to know about the spectrum analyzer.