The BOSS DD-7 Digital Delay is a guitar effects pedal that takes the best features from its predecessors and expands their creative potential. You get Modulation Delay mode, classic modeled Analog Delay mode, External pedal control options, longer delay time, and more. Even with the best-selling delays in compact-pedal history, BOSS continues to push the envelope and innovate. Expanded Delay Time Up to 6.4 seconds of delay time are available with the DD-7, a marked increase from its predecessor. In addition, Hold mode allows up to 40 seconds of input to be recorded for creating "sound on sound" performances. Delay Modes The BOSS DD-7 pedal is equipped with two innovative and advanced delay modes. Modulation Delay provides chorus-flavored sounds. Analog Delay offers a modeled simulation of the classic BOSS DM-2, beloved for its characteristic warmth. External Control For handsfree control of the DD-7 pedal, an external footswitch and Expression pedal (sold separately) can be used. Tap tempo can be controlled from an external footswitch, while delay time, feedback, and effect level can be changed on the fly via Expression pedal. Stereo Output Create amazing effects with the BOSS DD-7 pedal's stereo output, such as spatial audio sweeps via true stereo panning. You can also use the stereo outputs to create separate dry and wet signal paths -- handy for recording and live-performance control. Features: - Expanded delay time, up to 6.4 seconds - Modulation Delay mode offers natural, chorus-type sounds - Analog Delay mode models the classic warm BOSS DM-2 analog delay sound - Tap tempo controllable via external footswitch - Delay time, feedback, and effect level can be controlled via external Expression pedal (sold separately) .