BEHRINGER DIGITAL DELAY DD400 Ultimate digital Delay/Echo effects pedal with 7 different modescomparable to state-of-the-art studio processors 24-bit high-resolution stereo delay/echo with delay time up to 1.3 s Blue status LED for effect on/off and battery check First-class electronic On/Off switch for highest signal integrity in bypass mode Runs on 9 V battery or the BEHRINGER PSU-SB DC power supply (not included)