Crown Sporting Goods Portable 30W Crowd Control Megaphone and Bullhorn with Adjustable Volume and Alarm 30 watt megaphone with over 600 yard range Ideal for indoor and outdoor use by coaches, camp counselors, emergency personnel, firefighters, law enforcement and the military Measures x by x and weighs only x;Compact and lightweight portable with collapsible handle and wrist strap Built-in siren, music, volume control and On/Off switch Requires 4 D batteries