Maxon AF-9 is an analog envelope filter (auto wah) based on the Mu-Tron III, using an optical circuit that gives a thick, vocal, funky wah sweep that follows your picking dynamics.
It has Sensitivity and Peak controls, plus switches for filter type (low pass, band pass, high pass), sweep direction and frequency range, and it works well on both guitar and bass.

The product is sold as "As-Described" and with all functions working properly and all accessories are included in the product pictures (Items not shown in the photo are not included.)
All shipments are sent securely with a tracking number and we can offer expedited shipping (2-3 biz days to deliver) for an additional fee. The buyer has responsible for Tax, import duties, etc.
Returns are only acceptable if item's condition is not in the description. In such cases, please contact us within 3 days of receiving the item.
For our other policies, please check here. https://reverb.com/shop/pedals-plus-shop/about