This Megaphone with Siren in 25 watts will help you get heard in a crowd. Portable and can last for 6 hours of operation. Be heard up to 600m away with the powerful 25W amplifier and horn speaker. The microphone can detach from the back of the unit and allows you to hold it but still, speak clearly into the microphone. It includes a built-in siren generator and shoulder strap, to easily carry and trigger activation. It also provides the convenience of straight forward operation and power-saving while not in use.