This is a ROWIN compressor. It has only been tested for functionality. It's made overseas, so it has some scratches, hence the low price. ■ The ROWIN compressor pedal boasts high cost performance. It features smooth attack and release. It can maintain the original signal as much as possible. Its simple operation allows for intuitive sound creation. ■ Specifications Input: 1/4" mono jack Output: 1/4" mono jack Power: AC adapter 9V DC (center negative) Current consumption: 12mA Size: 95mm (D) × 45mm (W) × 53mm (H) ※ Batteries cannot be used. Guitar (2)