Multi-functional AXB-DLX base amplifier with tone controls and a headphone jack. - Model: AXB-DLX - Input: INPUT - Volume: VOLUME - Treble: TREBLE - Middle: MIDDLE - Mid-Frequency: MID-FREQ - Bass: BASS - Headphone Jack: PHONE Thank you for viewing. This came out of a closet at my parents' house. I have confirmed that sound comes out when the power is turned on, but I am not familiar with it, so I don't know if it's working perfectly. Please understand this before purchasing. Band Bass Practice Guitar Amplifier Gibson Roland