Covers audiences up to 3,500 in rooms up to 25,000 sq. ft. Take the Wireless Powered Speaker Voice Carrier outdoors, to an auditorium, or set it up in a conference room. 50 watt multimedia stereo amplifier with built-in UHF wireless receiver (584MHz - 608MHz) and 3 mic inputs, two Dual Module 50 Watt Wireless Powered Speakers and transmitter, 3 tripods, bracket for flexible gooseneck with mic holder. Includes professional cardioid dynamic handheld mic with 15-ft. cord and handheld wireless microphone with built-in transmitter. Includes rugged nylon reinforced carrying case on wheels with extendible luggage handle. Power ALL 3 COMPONENTS 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).