The Champion Sports Megaphones have a built-in siren when you need to get anyone's attention
The adjustable volume control allows you to adapt to different crowds and distances, while the convenient wrist strap makes it easy to hold and transport this megaphone
Adjustable 4 to 8 Watts
Audio Range: 400 yds; Length: 7"; Power: 4 W to 8 W; Power Source(s): 6 AA Batteries (Sold Separately).
Adjustable 12 to 25 Watts
Audio Range: 1,000 yds; Length: 9.5"; Power: 12 W to 25 W; Power Source(s): 8 C Batteries (Sold Separately).