RTS&S "ERESNIC" ELECTRICAL SIREN SERIES EES-100: SINGLE SPEAKER DRIVE EES-200: DOUBLE SPEAKER DRIVE EES-300: QUADRUPLE SPEAKER DRIVE EES-300A: STATIONARY SPEAKER ARRAY EES-400: HIGH POWERED SPEAKER DRIVE SET EES-400-2: DOUBLE SETS EES-400M: MECHANICAL CHOPPER VERSION OF EES-400 (We know it's not electric.)
