Cry Baby Mini with auto-return. It has some signs of use, but there are no issues with its functionality. Please refrain from purchasing if you are overly concerned about the condition. Feel free to ask any questions in the comments. The following is quoted from the manufacturer's website: Like the existing "CBM535Q," you can tune it to your preferred sound with four controls. The "Range Selector" allows you to choose from four sweep ranges, from warm vintage sounds to aggressive modern sounds. The "Q Control" changes the wah sound from a narrow bandpass that emphasizes high-frequency harmonics to a wide bandpass that emphasizes low-frequency harmonics. The "Volume Knob" adjusts the boost amount when the boost is on, and the "Boost Switch" turns the boost on and off (the LED lights up when it's on). While it's about half the size of a standard Cry Baby, it features authentic specifications, such as the red Fasel inductor. When you step on the pedal, the effect automatically turns on, and when you take your foot off the pedal, the pedal rises due to the leaf spring, and the effect automatically turns off, saving you the trouble of switching and allowing you to enjoy wah play more intuitively.