This is the JOYO VINTAGE OVERDRIVE. It's an effects pedal similar to the TS-9 and TS808. The original design had yellow knobs, but they've been replaced with black ones. As you can see in the photos, it shows signs of use, but there's no scratchiness in the knobs and it works perfectly. To avoid any issues, please check the condition of the product in the images before purchasing. Instant purchase OK, free shipping, no price reduction. ---------- The JOYO Vintage Overdrive effect pedal achieves a wide range of tones. - Brand: JOYO - Model Name: Vintage Overdrive - Controls: Drive, Volume, Tone - Connection Type: True Bypass - Output Jack: 1/4 inch jack ---Search Terms--- JOYO, donner, BEHRINGER, Ibanez, gokko, strich, zoom, boss, flamma, revol effects, pedal, Tube Screamer, Overdrive, overdrive, distortion, booster, guitar, electric guitar, ammoon, playtech