I am selling a fully functional, used Guyatone compressor. Battery and power supply operation have been confirmed, and there is almost no scratchiness. Unusually for a compressor, it has a "BRILLIANCE" knob for tone adjustment, making it very easy to use with its three simple knobs. Your guitar's sound will come forward and be easier to hear. If you want to use a clean boost without distorting your clean tone, please consider this. The matte black exterior and old-school design are also very cool. The design has a cool vibe, reminiscent of old band tees and skater style. Guyatone has many core fans, and this is a discontinued product, so it may become harder to obtain in the future. Please take this opportunity to purchase it. The box and manual are not included; only the unit itself is for sale. It's an effects pedal I really like, but unfortunately, another awkward payment is coming up this month, so please consider purchasing it. This is a used item, so please refrain from purchasing if you are overly concerned about its condition. Price reductions are not possible. Thank you for your understanding. From AI: Guyatone PS-003 Compressor Effects Pedal. LEVEL, SUSTAIN, and BRILLIANCE adjustments are possible. - Model: PS-003 - Brand: Guyatone - Type: Compressor - Controls: LEVEL, SUSTAIN, BRILLIANCE - Power: DC 9V - Country of Manufacture: Japan Thank you for viewing.