The Demonfx AT-DS is a high-gain overdrive/distortion pedal known as a clone of the "JHS AT+" signature pedal of professional guitarist Andy Timmons. It features versatile controls and an independent boost function, allowing for a wide range of sound creation. The unit comes with the original box. There are no manuals or other documents. The unit has almost no scratches and I think it's clean. Since the criteria for judgment differ for each person, please make your decision based on the photos. I believe the operation is problem-free. I noticed that the volume changes depending on the position of the toggle switch since I received it. I don't think you'll be controlling it during a performance, but please be aware of this information. It has been stored in a non-smoking and pet-free environment. Main Features and Controls • Volume: Adjusts the output volume. • Drive: Controls the amount of gain. Supports everything from blues-style crunch to hard distortion. • EQ: Tone control that adjusts the brightness and darkness of the high frequencies. • Air: Control that adds high-frequency brilliance, similar to presence. • Boost: Boost function that can be turned on/off with an independent footswitch. It's a lightly distorted preamp-like boost that can further saturate the drive channel. • 3-way toggle switch (25W / 50W / 100W): • 25W: The most compression and rich saturation. • 50W: A good balance of compression and openness. • 100W: High volume and an open crunch sound. The AT-DS has an amp-like drive feel and rich overtones, supporting a wide range of genres from blues to hard rock. The independent boost function allows for soloing with good note separation and emphasis on dynamics. Also, the 3-way toggle switch simulates the output characteristics of different amplifiers, allowing for flexible sound creation in live performances and recordings. Thank you for viewing. Thank you. Type: Electric guitar, effects pedal, distortion, overdrive, high gain