This optional update lets you swap the 4 original effects of your DJM-350-W (NOISE, SHORT ECHO, FILTER, JET) to the 4 from the DJM-350 (GATE, CRUSH, FILTER, JET).
The effects swap can be reverted by reinstalling the original DJM-350-W firmware.
Optional labels for your DJM-350-W are also available to make the buttons on your mixer match the new effects.
These labels are called DRW2480 (white) and DRW2481 (black). Please contact customer support for more info.