Great for sporting events, auctions, controlling crowds and more, this Compact Megaphone features sliding volume control and a built-in siren. Convenient carry strap ensures that megaphone doesn't get lost. Requires 4 'C' batteries (not included). Measures approximately 9" long. Comes packaged in an individual box. Box measures approximately 5.5" x 5.5" x 8.5". ,Compact Megaphone with Siren,Megafono Con Interruptores