Traditional wireless monitors use MPX technology (which utilize a single frequency to send encoded stereo content), a similar technology used in FM broadcast, thus limiting 100% separation between the right and left channel. VocoPro iem-digital uses two separate Digital frequencies to send out stereo/dual mono signal to each stereo body pack receiver, Providing the user with a true stereo experience. 24 bit digital means the user receives crisp highs, thumping lows, and the best possible full range sound for the money. The IEM –digital is now available in 4, 12 or 50 packs ideal for performing, practicing, production, and assisted listening or translating. Get the best possible sound for the money with VocoPro iem-digital.