Used once for a live performance and then stored at home, so the condition is very good. The multi-functional M1 BT compressor is equipped with volume and tone controls, which are ideal for sound quality adjustment. - Model Name: M1 BT - Input Terminals: RCA Input - Output Terminals: RCA Output - Power Adapter: Included - Control Knobs: Volume Knob, Tone Knob, Gain Knob Thank you for viewing.