• Built-in siren
• 0.8 - 2 km range
• USB port
• Memory supported
• Made in China
• Show
  
  ER-66 megaphone has built-in siren, maximum 25-watt power requirements,
  
  range 0.8 - 2 km, 8 x "C" type batteries, external power source 12V
  
  battery or 8 x 1.5V DC, speaker impedance 8 ohms, dimensions 230 x 350,
  
  weight 1.65 kg.