DOD Envelope Filter 440 Effects Pedal With Two Voice Settings W-Cables Description For such a simple layout, there’s a lot going on with the 440. In addition to gobs of boost, there is also a “tilt” tone control, and a unique buffer scheme. When the Buffer Switch is on, it is always on, even when the pedal is in bypass. When the Buffer Switch is off, the pedal is true bypass. This allows the 410 to be used as a buffered boost, unbuffered boost, line driver, stand-alone buffer, and an always-on tone sweetener with or without buffer. More than just More Me! While the 410 is based on the vintage ’70’s 440, it has a lot more tricks up its sleeve.    Based on original DOD Bifet Preamp 410 circuit design with updated components    Buffer On/Off Switch    True Bypass and new crisp blue LED status indicator    Lighter aluminum chassis     Fast & Free Shipping!