Vintage hand crank siren in good shape for age. Crank and siren work well and is quite loud. Measures 6 1/2" from top of siren to bottom of base. Diameter of actual siren is 4 1/2". Mounting base is 6" long with holes approx. 5" apart. "Federal Electric Company Inc., Chicago" is embossed on back of siren as seen in pictures.