Ideal for crowd control,fire fighting,rescue operations, sports events..etc Handy megaphone,portable megaphone,sports mini megaphone,loud speaker. MODEL:mini megaphone with speaker & siren *size: Φ82xL130 *Dry cell: 3x7#(size AAA) *Power: RMS 5W / MAX 10W *function: speaker & siren*color: silver/white,etc