  Supposing the $Z_{c}^{+}(3900)$ as a charged partner of the X(3872), we use
the QCD sum rules techinques in order to obtain the coupling constants of the
$Z_{c}^{+} \, J/\psi\, \pi^{+}$, $Z_{c}^{+}\, \eta_{c}\, \rho^{+}$ and
$Z_{c}^{+}\,D^{+}\, \bar{D}^{*}$ vertices and the corresponding decay width of
these channels. We considered that the $Z_{c}(3900)$ can be described by a
tetraquark current with the $J^{PC}=1^{+-}$ quantum numbers. As a result, we
obtained a decay width value in good agreement with the experimental values
reported by BESIII and Belle collaborations.
