This is an A1BP TYPE II bass preamp featuring a high-quality original circuit. I acquired this unit and have been using it, but I'm selling it because I don't use it much. While there's a general feeling of use, it functions well. I will ship it with the original ALBIT adapter. - Model: A1BP TYPE II - Type: Bass Preamp - Controls: Volume, Treble, Bass, Hi-Mid, Lo-Mid, Master, Notch, Send, Return - Connectors: Input, Tuner Out, Send, Return, Output, Balanced, Headphones - Power: Dedicated AC Adapter Thank you for looking.