The BJS-160BT is a complete PA Speaker and Amplifier package with Dual speaker monitors, stands and a built-in MP3 player with SD/MMC card and USB inputs and Bluetooth Connectivity. The amplifier/mixer module consists of a 4 channel audio inputs. Inputconnections include 4 – XLR connections, 4 – ¼” Audio jack connections, and 2 pair ofRCA stereo connections. Each channel includes individual gain, Bass, Treble and echoeffect control . Master echo effect, Bass Treble and gain controls are also present. Signal outputs include a ¼” audio jack and pair of RCA stereo connections. The speakerseach consist of a 15” ported Subwoofer and 1.5” tweeter driver behind a molded horn toproduce a total of 5000W Max output.