Wembley Coach's Megaphone/Bullhorn with Siren - Limited Edition - Blue Compact, lightweight megaphone let's your voice be heard loud and clear Built-in siren, volume control, power on/off switch, siren and speak control, and a convenient carry strap Commonly used by the sports coach's and activity directors due to its versatile size and weight Runs on 4 "C" batteries (not included). Variable volume control. For indoor/outdoor use Tough housing, 8.75-in wide with a folding handle