Description: * Mixer amplifier with MP3 source (SD card storage), programmable to play MP3 music. * Suitable for small background music playing places Features: * Large LCD display, simple operation interface, and support Chinese and English bilingual operation. * Mixer amplifier built-in MP3 and weekly timer. * Play, all play, circle, repeat, random play modes. * The program consists of four sets of main program and one set of standby program; Support number key to select the playback. * Bass/treble tone control and volume control for MP3, Mic, Aux1-2 and master volume control. * Priority：MIC> line input >MP3 audio source. * Built-in high and low pitch adjustment function, and automatic control gain voltage limit function. * Automatically cut off the main power supply function when there is no sound source signal, and automatically enter the energy-saving mode. * Speaker output: 70V, 100V and 4-16Ω. * Extensive protection include high temp, overload and short circuit.