Electro-Harmonix Micro Q-Tron Envelope Filter The small Q-Tron. An envelope-controlled filter that responds accurately and quickly to the strength of your picking. The cutoff frequency changes according to the size of the input signal, and the pitch of the filter changes at the same time. In addition to the three modes of HP/BP/LP, the Q is also adjustable, achieving a variety of sounds despite its compact size. You can have fun with it as an auto-wah, and it will be useful as a special effect for live performances and recordings. Functionality confirmed, unit only. Please understand that this is a used item. To prevent replacement, please agree to no returns and no claims before purchasing. ◇◇◇◇◇◇◇◇◇◇◇◇ * Please note that we may also be listing on other flea market apps, so please understand if there is a discrepancy. * We will give priority to the person who purchases, even if negotiations are in progress in the comment section. * There may be some differences in color due to light reflection and the way it is photographed. * Since there are many used and vintage items, please refrain from purchasing if you are looking for a new item, are very sensitive, or have no manners in your communication, as this may cause trouble. * Please understand that we may withdraw the listing depending on the sales of other products. ◇◇◇◇◇◇◇◇◇◇◇◇