45 watts high power megaphone features handheld mic with volume control and high power siren. Includes lock switch for microphone. Shoulder strap, mic hanger and antenna holder. Aux. input provided. Operates on 12V DC or 10 D batteries. (batteries not included) Effective 7200 FT quiet suburban area 2,600 feet city area. Bell Dia 14"x20" long 9.00 lbs w/o batteries