Luminosity of WISE J141046.00+740511.2 at 1.4 GHz as a function of redshift (red dotted line). The threshold of Gregg et al. (1996; green solid line) separates the BZCAT sample of known-redshift BL Lac sources into radio-loud (blue) and radio-weak (magenta) blazars. The red dotted line (diamonds) shows the luminosity that WISE J141046.00+740511.2 would have as a function of redshift according to our 1.4 GHz data. The black square shows the position of the confirmed RWBL J154419−064913. In the lower panel, we show a comparison of the extrapolated luminosity at 5 GHz of our source (red dotted line) with the sample of HBL (orange filled triangles), LBL (open pink triangles), and FSRQ (cyan crosses) blazars.