30W RMS with heaviest magnet in its speaker class (means most efficient); Accepts a) one 16-channel UHF and b) two wired mics at the same time; Connects with computers and LCD projectors, multimedia players through two inputs; LED lights give assurance with visual confirmation of power, signal and reception; Line output to additional wired speakers for larger presentations; Rugged brass sunburst teeth for worry-free mounting; Multi-use portability for classrooms, auditoriums, meeting rooms, hotels, conferences and presentations, 900 mHz