The Pyle PMP37LED is a lightweight and durable megaphone bullhorn. With each iteration of our flagship megaphones, we've improved the battery life, power and ergonomics. This model features 30 watts of power, so your voice will be heard from up to 800 yards away. Integrated LED flashlight mode is activated by the touch of a button and can shine some light if you want to project your message at night. And if you need to get everyone's attention, simply switch to the siren mode to activate a loud, powerful alarm sound. Works great for indoors or outdoors. 800 Yard Range Power Output 30 Watts For Indoor/Outdoor Use Adjustable Volume Control Used By U.S. Armed Forces Button Activated LED Light Mode Button Activated Siren Alarm Mode Lightweight, Portable Powerful Battery Powered by 4 x 'C' Batteries, Not Included Dimensions: Diameter 6.2'' x Length 10.0''