Far more lightweight than traditional megaphones., the Amplivox Mity-Meg 25 uses Piezo dynamic technology to achieve a loud and clear reproduction of the human voice using battery power. It features a comfortable pistol grip and has three modes for different applications: Talk, to amplify speaking, Siren, to issue warning, and Whistle to issue urgent warning. Its practical range in ideal conditions is up to one mile (1760 yards). Weatherproof high impact plastic and steel make this a reliable tool for band directors, event organizers, protest leaders and parents who want to surprise their children in the morning. A battery indicator light shows power status (low, med, hi) on the outer housing. A volume/gain knob is located inside the cover for control over the sound. The Mity-Meg 25 requires eight C-Cell batteries and lasts up to 40 hours continuously. Half the weight and twice the battery run time of other megaphones. Net weight 2lb. without batteries.