The commercial (public address) power amplifier has a 6-zone speaker output with individual volume control; cast-aluminum panel and integrated handles for enhanced durability Versatile inputs with 3 sets of RCA inputs, 2 mic inputs (including 1 priority mic), USB input, FM radio tuner, and Bluetooth for easy connection to audio streaming devices; each of the 2 mics has speed and echo control Built-in clipping limiter and reliable cooling system protect your speakers and amplifiers from overheating The audio amplifier is ideal for multi-room applications or broadcasting system such as restaurants, lounges, bars, pubs, schools and warehouses