  Uniqueness of static, asymptotically flat, non-extremal {\it photon sphere}
in Einstein-Maxwell spacetime with electric and magnetic charges has been
proved. Using conformal positive energy theorem, as well as, the positive mass
theorem and adequate conformal transformations, we envisage the two alternative
ways of proving that the exterior region of a certain radius of the studied
static {\it photon sphere}, is characterized by ADM mass, electric and magnetic
charges.
