The Behringer CL9 Compressor/Limiter pedal smooths out volume peaks and provides endless sustain with ultra-stable dynamics. This pedal features Sustain, Level, and Attack time controls for shaping your sound. It is designed to provide a powerful, percussive sound, making it suitable for guitar and bass. The CL9 can be used with various instruments, including synthesizers, electronic drums, and after other effects like overdrive or distortion. Reviewers note its transparent operation, good sound quality, and versatility in both compression and limiting.