Compact desktop style mixer amplifier suitable for background music playback and public address in cafes classrooms and other small indoor venues. 4-16Ω output or a 100V selectable output Power efficient switch-mode power supply Class D digital power amplifier technology One XLR microphone input with switchable +48V power supply and independent volume adjustment control 2 line audio inputs each with independent volume control LCD screen display with automatic playback of MP3 audio format songs and power-off memory function MP3 player and remote control function supports playback from U disk and MicroSD card FM Radio receiver Bluetooth receiver for audio playback from computers mobile phones and other devices Priority function for microphone 1 input mutes all other audio inputs Indicator LEDs for power signal distortion and protect Automatic protection from short circuit overload and over-temperature IR remote included Seetronic Power Twist TR1 input Supported file types: MP2 MP3 WMA APE FLAC AAC MP4 M4A WAV AIF AIFC and other file formats Input sensitivity and source impedance: MIC input: +5mV balanced XLR AUX1-2 input: 350mV unbalanced RCA sockets