Check the listing for details. Boss: CS-3 Compression Sustainer Pedal (Open Box Special). Condition: Open box. Listed at 89.99 USD. Open Box / B-Stock Notes exterior grade: 9.0 out of 10 - near mint item cosmetic note: n/a item function: ✔️ tested item exterior packaging: original, packaging may show damage note: all open box / b-stock items are final sale Lab Points compact compression/sustainer pedal with high-quality circuitry compresses loud signals and boosts softer signals for a smooth overall sound 4 effect knobs allow for precise sound manipulation "The CS-3 Compression Sustainer pedal compresses louder signals while boosting lower signals, providing smooth sustain without degrading the original sound quality. Onboard Level, Tone, Attack and Sustain controls for precise tonal shaping, and the low-noise design allows super-quiet operation. This is the perfect pedal for guitarists and bassists who want to sound their best." - Boss