I specifically bought this Behringer Swing Controller to use with my Behringer 2600 Blue Marvin. I already own a KeyStep 37 for my other Modular Synth setup but wanted one exclsusively for the2600. When Behringer first released their SWING it was met with a lot of controversy because it was an identical "Clone" of the Arturia KeyStep 32. Soon after Behringer made some minor cosmetic changes by changing the position of the top control buttons and knobs, basically swapping their positions so now it is NOT an EXACT copy. But Functionally it is and works the same way. I personally feel that Behringer making a clone of a quality product is good for business and ultimately us, the consumers. Interesting how Arturia has recently reduced the price of their KeyStep 32. Anyway I decided on this SWING and I can say that I am very pleased with it. It is a perfect match for my 2600 Blue Marvin and works flawlessly and $50.00 less then the KeyStep 32. Since this is dedicated as a MIDI Controller to the 2600 I did buy a Power Adpter by Security-01 for it here on amazon. You will need a DC 9V 0.5A 500mA Power Supply Adapter, Plug 5.5mm x 2.1mm, Center Positive.