DigiTech DOD FREQOUT-U Dynamic Feedback Guitar Expression Pedal, Silver W/Cables     The FreqOut has adjustable feedback Onset (delay before feedback begins), Gain (feedback level to balance with your dry signal), Dry On/Off, latching or momentary operation, true bypass, and a rugged road-tough steel chassis. However, the FreqOut can also be used at gig volume to focus out-of-control feedback on a preferred harmonic at any stage position.   The FreqOut uses a 9VDC power supply to easily integrate into your existing pedalboard.    Fast & Free Shipping!