Add some funk to your pedal board...and a fixed wah too! The BYOC Envelope Filter & Fixed Wah has 3 parameters when in envelope filter mode: Sensitivity, Range, and Attack. When in fixed wah mode, themanual knob lets you control where you park the frequency, and the range knob lets you control the Q.This circuit uses a 13600 Dual Transconductance Operation Amplifier and has a fairly low part count,making it a fantastic sounding envelope filter that's very versitile and easy to build.We are an authorized BYOC Dealer.International Buyers – Please Note:•Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer’s responsibility.•Please check with your country’s customs office to determine what these additional costs will be prior to looking/buying.•These charges are normally collected by the delivering freight (shipping) company or when you pick the item up – do not confuse them for additional shipping charges.•We do not mark merchandise values below value or mark items as ‘gifts’ - US and International government regulations prohibit such behavior. _gsrx_vers_454 (GS 6.3 (454))