All in One Battery Powered Portable PA with Professional-Grade Mixer. * Suitable for pole mounting or as a wedge monitor * Frequency range 40Hz~18KHz * System Maximum power: 1800 WControls and Function * Mode * Previous/VOL – * Next/VOL+ * Repeat the song/TWS * Pause/Play/Folder * Control the echo effect of microphone input CH1-CH2 * Tone control of input signal CH1- CH4 * Volume control of input signals for each channel CH1-CH4 * XLR connector for CH1 signal input. * Microphone/Guitar/CH2 Input Combination Connector * CH2 microphone/input signal selection switch Guitar/Thread * RCA connector for CH3 signal input * CH4 signal input auxiliary connector * CH1-CH4 main capacity control * Canon connector with signal output line. * Power switch * Power input socket.