This is a valuable early model. The sound is quite different from the current models. The differences are discussed enthusiastically online, and I generally agree with the assessments. I believe this is a rare item. Multi-functional bass DI effector, LEVEL, BOOSTER, and GAIN adjustable. - Model Name: BASS DI - Brand: TDC - Controls: LEVEL, BOOSTER, GAIN - Output: PARA OUT - Input: INPUT Thank you for viewing.