Be Heard In Any Crowd! Pistol Grip Megaphone With Trigger Switch For One-Hand Operation. This Megaphone Has a Very Clear Voice Output, An Acoustic Range Of 1 Mile And a Rated Power Output Of 15 Watts. Eight "C" Dry Cell Batteries Power The Dynamic Microphone And Siren Sound. Weighs a Mere 3.5 lbs. Without Batteries. Measures: 9.25" Round (Bell) x 14.5"L.