The Anchor-Audio AN-130U1 is a 2-way, magnetically shielded, portable P.A. speaker, with 30 Watts of amplification, a built-in 16 channel UHF wireless receiver, and a wireless remote control, serving the classroom, lecture and presentation markets. This speaker features independent front panel bass and treble controls, along with a volume knob. The rear panel is equipped with 1/4" Microphone and Instrument inputs, along with a pair of RCA line level connectors. The Carbon Fiber woofer is covered by a protective metal grill, and the power supply is internally switchable for international use.