Built-in MP3 decode player and FM radio player, switchable play mode 

Supports USB stick and SD card for song storage and convenient song changing, remote control for easy operation 

Designed with 2 microphone inputs, 2 line inputs and 1 aux output 

Two output modes: fixed voltage output 70V/100V，fixed impedance output 4～16Ω 

Each channel has independent volume control, with treble/bass volume adjustment 

Microphone1 has the top priority

Protection warning function: the corresponding LED lights up when clip/overload /thermal/short circuit protections happen