HI-bearing dwarf satellites projected separation from the host for the subsample of 50 ETGs (top) as a function of the HI mass (middle) and gas fraction (bottom). We show the fraction of dEs with blue dots and error bars (top), defined as the 1σ binomial confidence intervals. The colorbars indicate the distance of the dwarf in Mpc (middle) and the dynamical-to-baryonic mass ratio (bottom). The dashed line represents the running average of the HI mass per bin of width 50 kpc (middle). We highlight the dEs with circles, the dIs with triangles, and added the TTDs as diamonds, and UDGs as stars to the bottom plot.