ER520S 6W Megaphone with Siren 250m Range RedSmall in size and light in weight, the ER 520S megaphone can be easily carried by a single hand. It can also provide a siren tone. The newly developed polyimide diaphragm is employed to ensure high sound quality. Product Features Power Output: 6W Rated 10W Max. 8 AA batteries (8 hrs) Range: 250m (speech) 315m siren Anti bacterial treatment for all models (mouthpiece microphone and handle) High durability ABS or ASA resin construction Compact and