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Amazon.com : MGROLX 50W Professional Bluetooth Megaphone Bullhorn Speaker with Detachable Microphone-Rechargeable Battery&Portable Strap-Siren and 260S Recording-USB/SD/AUX Input-for Police, Cheerleading, Outdoor : Sports & Outdoors
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TOA ER-2930W 45W Shoulder Megaphone With Whistle And Wireless Microphone Option, White Or Gray | Full Compass Systems
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Amazon.com : HornPro Professional 50-Watt Bullhorn Megaphone - Detachable Microphone, Portable/Lightweight & Rechargeable Battery ,Built-in Bluetooth/USB/SD/AUX- Ideal for Police & Cheerleading (Black) : Sports & Outdoors
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Amazon.com : Loudmore Professional 15" Large Megaphone Bullhorn with Detachable Microphone, USB/SD/MMC Reader, AUX Input, Recording and Siren - Perfect for Indoor/Outdoor Sporting Events and Crowd Control (Black) : Sports & Outdoors
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Amazon.com: Pyle Bluetooth Portable Megaphone Speaker - Bullhorn with Wired Microphone, Siren Alarm, MP3/USB/SD Readers - Perfect for Cheer, Football, Kids, Outdoor Activities : Electronics
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