This is a Jim Dunlop Crybaby 535Q (MULTI-WAH). By switching the frequency range of the wah with the dial and adjusting the peak strength with the Q knob, you can be sure to find the wah sound you're looking for. (No need to try various types of wah pedals) Furthermore, you can boost up to +16dB with the boost knob. The inductor is equipped with the red FASel, the heart of the Crybaby. I bought it new in 2006, but it has been stored unused. The protective seal on the back cover is still attached. The items in the photos, including the adapter, are also included. Type...Electric Guitar Manufacturer...Jim Dunlop Effect Type...Wah Pedal