This photo on Droptek's Facebook page displays his DJ gear. The six yellow buttons in the center, the triangular Behringer logo in the lower right hand corner of the mixer, and the five EQ channels indicate that it is the Digital Pro Mixer DDM4000 model.
The DDM4000 and his unit exactly, has been used since first released in 2004. This is his original unit and till this day, can still been seen being used. This mixer has truly passed the test of time thus far.