Built-in Bluetooth, FM, and USB functions. 2 MIC inputs, 2 line inputs, 1 line output. 2 EMC inputs (100V/375mV), 1 EMC output. Support 100V/70V constant voltage output, and 4-16Ω constant resistance output. Can be controlled by the infrared remote controller. With the priority function, the priority is EMC/MIC1>AUX1/AUX2/MIC2. With master volume control, individual volume control for MIC & LINE, treble, and bass volume control