Megaphones-with-Sirens-Adastra-952-019UK-P-A-30W-durable-pistol-grip-megaphone-for-outdoor-voice-reinforcement-applications-With-features-such-as-anti-feedback-microphone-which-can-be-attached-to-the-megaphone-or-hand-held-switchable-siren-function-and-a-robust-ABS-construction-make-this-loudhailer-ideal-for-use-either-hand-held-or-shoulder-strap-operation-in-a-wide-variety-of-applications-P-Adastra-952-019UK-30W-Megaphone-With-Siren-