The DL4 MkII includes all the sounds and features of the original DL4, while introducing new sounds and features. The 15 new MkII delays were drawn from our HX family of amp and effects processors and the 4-Switch and 1-Switch looper types offer up to 240 seconds of record time (expandable to several hours using an optional microSD card). There's an XLR microphone input, MIDI In and Out/Thru connectors, heavy duty footswitches, three bypass options, and a jack for connecting an optional expression pedal or two footswitches. The DL4 MkII is also smaller and lighter than the original, making it an even more appealing choice for modern musicians.