Weatherproof mike hooks on to rear for standard use. Megaphone may be shoulder mounted with mike detached. Coiled cord and talk switch on mike for hand-held use. Solid state amplifier has a signal alarm for warning alert, fog horn, or "mayday". Power output: 25 W. peak - 20 W. rated Uses Class B push-pull circuit Batteries: "C" cells (not included) Pistol-grip talk switch Dynamic mike on coiled cord; talk switch Signal alarm switch Hand & shoulder straps Bell diameter 9 1/2", length 15".Shipping weight 7 lbs.