EXP2 expands the MRK980 dual‑channel receiver by adding Zoning signal distribution and RF over Fiber reception. It mounts on MRK980 with option EXP0 (one unit per receiver) and enables multiple MRK980s tuned to the same frequencies to share the best audio signal. RF range 170–1260 MHz; fiber interface LC/APC duplex. Audio is via three electronically balanced mini‑XLR 3‑pin connectors. Dimensions: 20 × 94 × 220 mm; weight 130 g.