Wireless Quad Half-Mile Hailer Kit covers an area beyond the length of a football field and youth sports athletic fields. Powerful PA reverberant horn delivers 108dB sound pressure level over the 584-608MHz audio range. Includes the 50W multimedia stereo amplifier with built in 16 Channel UHF wireless receiver Plus 4 horn speakers, two 40-ft. cables, two Y-adapters, Dynamic handheld mic, wireless headset and lapel mic with body pack transmitter, bracket, mic clip and gooseneck, three compact tripods, and a rugged carrying case on wheels with luggage handle. Your audience can hear loud and clear while you direct the action! Great for athletic events, band practice, field days, public safety, law enforcement, outdoor marketing events, crowd control, auctioneers, political campaigns, missionaries - any outdoor event. Power with Optional AC adapter or power up to 200 hours with 10 D-cell alkaline batteries (not included); or Rechargeable NiCad Battery Pack (requires AC adapter).