ER520 6W Handheld Megaphone 250m RangeSmall in size and light in weight, the ER 520 megaphone can be easily carried by a single hand. The newly developed polyimide diaphragm is employed to ensure high sound quality. Poduct Features Power Output: 6W Rated 10W Max. 8 AA batteries (8 hrs) Range: 250m (speech) Anti bacterial treatment for all models (mouthpiece microphone and handle) High durability ABS or ASA resin construction Compact and lightweight Wide frequency range for enhanced audio