Check the listing for details. BOSS CS-3 Compressor / Sustainer. Condition: New. Listed at 147.06 USD. Particularly loud tones are lowered, while very quiet tones are raised: This gives you an even, fat guitar sound that can also be controlled in the attack. With the sustain function you can make your tone sound extremely long. Also suitable for bass. - Power supply with a 9 V battery or a 9 V DC power supply (coaxial connection - negative pole inside - not included in delivery, e.g. Art. 409939) All of our items have a 30-day return policy without explanation. Sheet music, reading material and software cannot be exchanged. The General Terms and Conditions of Zoundhouse GmbH & Co. KG apply. When purchasing multiple items: Add the items to your shopping cart and select “Request total from buyer” at the top right. If you intend to buy multiple items: put them into your shopping cart and choos.