Purchased in beautiful condition used a few times. The condition is good. Bluetooth confirmed ok. The multi-functional M1 BT compressor is equipped with volume and tone controls, ideal for sound 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 looking.