Optical + Infrared spectra of USco1621 B (upper panel) and USco1556 B (lower panel), in grey, completed with a T_eff = 2000 K and log (g) = 4.0 BT-Settl model spectrum from Allard et al. (2012); Baraffe et al. (2015), in light blue. Available photometry from Pan-STARRS (pink open squares), UKIDSS (green open squares), and AllWISE (black open squares) is added. Vertical error bars of the photometry are smaller than the markers. Filled circles correspond to the flux values obtained through direct integration of the spectra in the same filter bands. Horizontal error bars represent the filter bandwidths.