Envelope follower (av faults), so for what I know the technique of the effect, and as the doc is a quarter-page résumé is a filter that Ragit function of the input signal with roughly three types: low pass, band and above, rglage the drive (frquence I think) and "Q", say the level of wahwahlike.
so basically, for the jargon, is a autowah

old school metal box that looks very tough ...
just for fun, a game comes with strings, it is always nice.
and then the packaging wooden box with lid, it's fun too. but hey, it's not the package that sounds, in short ...

UTILIZATION

One in, one out, a switch, and battery operation. can not be simpler.

SOUND QUALITY

I just beginners guitar, but it seems to me that this is trs pedals well made.
it has a warm, round, a few buttons on the box can be drawn in respect of varied sounds, and it is surprising hip wriggling playing with

short, for a autowah, I find that it fulfills its role is all.

OVERALL OPINION

Small pedals not CHRE (Thomann) that has a sound that I find impressive.