Amazon.com : Pyle Megaphone PA Bullhorn Speaker - Built-in Siren 50 Watts Rechargeable Battery- 10 Sec Record Function for Football Baseball Basketball Cheerleading Fans Coaches or for Safety Drills - (PMP59IR) :
Emergency Megaphone with Siren - HAZMAT Resource
Er44 20W Bullhorn PA System Loud Speaker Handle Megaphone with USB/TF/Siren/Recording/ Rechargeable Battery/Charger Multifunction - China Megaphone and Handle Megaphone
Amazon.com : japomizuno Rechargeable Megaphone Speaker,Portable Bullhorn with 240's Recording and Siren,800 Yard Range,Rechargeable Battery Included, Compatible with Alkaline Batteries,Powerful and Lightweight : Sports & Outdoors