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Recently, the inverse electrodynamics model (IEM) was introduced and appliedto fined Reissner-Nordstr\"{o}m black holes in the context of the generalrelativity coupled minimally with the nonlinear electrodynamics \cite{1}. Thesolution consists of both electric and magnetic fields as of the dyonicsolutions. Here in this note, we show that the IEM model belongs to a moregeneral class of nonlinear electrodynamics with $T=T_{\mu }^{\mu }=0$. Here$T_{\mu }^{\nu }$ is the energy-momentum tensor of the nonlinear electrodynamicLagrangian. Naturally, such a dyonic RN black hole solution is the solution forthis general class.

Comment on "Reissner-Nordstr\"{o}m Black Holes in the Inverse Electrodynamics Model, [arXiv:1407.4383]"