The AmpliVox S602 MityMeg 25 Watts Megaphone is an incredibly lightweight and energy efficient megaphone with a surprisingly loud voice. The Piezo Dynamic Technology means solid state circuitry which produces superior efficiency in a feather light package. This is accomplished through full-sized diaphragms and ceramic wafers. By eliminating traditional megaphone magnets, the weight is eliminated and the full-frequency response and loudness of voice coils remains. The S602 works as a conventional handheld megaphone or it can be used as an over-the-shoulder megaphone with a separate microphone for greater versatility.