PDFs of different observable properties of MBHs associated with a host galaxy which eventually merge within the LISA band (purple dashed) and do not merge referred to as NMBH, (blue solid) at z > 6. In the left column, the cyan bars represent the non-merging MBHs which are detectable by EM telescopes and in the right column, the lavender bars represent the LDEs which are also EMDEs (see also Fig. 2). We report results for different wavelength bands: X-ray (first row), UV (second row), [CII] (third row), FIR (bottom row). In each panel, we also report the average and 1σ values of EM bright events.