The Califone PA15 Handheld Megaphone uses the latest communication technologies to ensure that educators and students can hear your critical, important message loud and clear from up to 1,000 feet away. This megaphone is built with rugged, durable ABS plastic to withstand any kind of weather and is dependable for drills and emergency response situations. It features a volume control for the emergency siren/alert operation, a built-in electret microphone, 15 watts RMS of power, an accessible on/off switch, and a strap on its handle.