Powerful, compact, and portable megaphone offers 30 watts of power and an 800-yard range.Built-in microphone in rear of unit, is activated by trigger control and offers voice recording with ten-second integrated audio memory voice playback.Variable volume control, built-in siren, and rugged ABS housing; used By U.S. Army, Navy, Air Force, and Marines.Powered by four D batteries (sold separately); measures 6.25 by 6.25 by ten inches (W x H x D) with 1.15-pound weight.Includes limited one-year manufacturer's warranty They'll hear you at the far ends of the field when you use the 40W thousand-foot megaphone. Easy to hold, easy to carry, it has more than enough range. The microphone is built into the rear end of the unit and is activated by a trigger controBe heard up to 800 feet away with this super-powerful, 30 watt megaphone with voice recorder.This megaphone includes a 10 second integrated audio memory for voice playback. Amplify your voice cord-free and with clarity with this lightweight device.Unit includes adjustable volume control, built-in siren, and wrist strap for added safty. Requires 4 D batteries (not included).