VOICE MODE: The megaphone speaker has 2 audio modes; The first one is voice mode wherein the bullhorn amplifies a voice or sound spoken into the microphone; This mode is most commonly used in cheerleading and other school activities SIREN ALERT MODE: The second mode is siren alter mode; With this mode, the bullhorn can act as a siren and sound an emergency alarm tone with just a push of a button; This mode can be used by the police and anyone else 30 WATT POWER: The power output of the portable megaphone is 30 watt max; It is battery operated and requires (4) x D batteries; It also has a silver ergonomic pistol grip design and mini lightweight chassis