Built-in 50 watt amplifier, receiver and dual Jensen 6" x 8" speakers. It includes a Transmitter which connects to the line-out or record-out jack on all of our Multimedia Stereo Amplifier equipped systems for a cordless link between the main PA and the Speaker within the 300 ft. reception range. Powered with 10 D-cell batteries (Sold Separately). AC Adapter/Recharger, and rechargeable NiCad Battery Pack also available. 13-1/2"W x 5"D x 10"H overall.