  The product of the electronic width of the $\psi(2S)$ meson and the branching
fraction of its decay to the muon pair was measured in the $e^{+}e^{-} \to
\psi(2S) \to \mu^{+}\mu^{-}$ process using nine data sets corresponding to an
integrated luminosity of about 6.5 pb$^{-1}$ collected with the KEDR detector
at the VEPP-4M electron-positron collider: \[
\Gamma_{ee}\times\mathcal{B}_{\mu\mu} = 19.3 \pm 0.3 \pm 0.5 ~\text{eV}. \]
Adding the previous KEDR results on hadronic and leptonic channels, the values
of the $\psi(2S)$ electronic width were obtained under two assumptions: either
with the assumption of lepton universality \[ \Gamma_{ee} = 2.279 \pm 0.015 \pm
0.042 ~\text{keV} \] or without it, summing up hadronic and three independent
leptonic channels: \[ \Gamma_{ee} = 2.282 \pm 0.015 \pm 0.042 ~\text{keV}. \]
