The EH Bass Micro Synth is one of the finest bass synth units available. All analog means a nice fat tone. The controls are Trig, Sub Octave, Guitar level, Octave, Square Wave, Attack Delay, Resonance, Start Frequency, Stop Frequency and Rate. I am the original owner of this unit. It is in near mint condition. There are a few very small marks on the front. The marks are so small I dont think they would show in a pic. All of the slider controls are perfect. It also comes with a power adapter, the original box, and instructions. I bought this unit several years ago and I now rarely use it. Since I just got a new bass I need to help finance that purchase. I am selling this for $175 shipped to your door. I will also consider trades of all sorts.