BOSS Bass Synthesizer SYB-5 Operation confirmed. It should work without any problems, but there are scratches, dirt, and signs of aging. Please check the photos. The original box is not included. A bass synthesizer that provides a wide variety of sounds. Model Name: SYB-5 Type: Bass Synthesizer Output Terminals: OUTPUT A (MONO) Input Terminals: INPUT Effects: EFFECT / DIRECT / RES Modes: MODE Connection Terminals: EXP Power: 9V battery or AC adapter