Features: 6-channel amplifier system compact desktop audio receiver design built-in Bluetooth for wireless audio streaming, FM radio tuner with digital LCD display front panel button control center audio source input mode selector connect & playback audio from external devices, headphone jack with independent volume control (2) 1/4'' Microphone input jacks built-in microphone talk-over function (Mic1 only) MP3 Digital Audio File Support USB flash drive & SD Memory Card readers push-type speaker connectors ax (3.5mm) input jack REC + Subwoofer output RCA (L/R) Connectors audio input RCA (L/R) Connectors short circuit & over voltage protection audio Configuration settings: treble, bass, Master volume, echo, mic volume, mic tone convenient audio source control for home or office use.