Large groups and teams on wide open fields will benefit from the Champion Sports 8 Watt Megaphone. Able to be heard up to 800-1200 yards away, this megaphone also comes with a built-in siren when you need to get their attention. The adjustable volume control allows you to adapt to different crowds and instances, while the convenient wrist strap and ergonomic handle makes it easy to hold and transport this megaphone.