A compressor limiter. Later the pedal was re-released as the CP-10 compressor in the 10-series. Circuitwise the CPL and therefore the CP10 are similar to the CP-9 except for the VCA used. In the CP-9 half of a LM13600 OTA was used. In the CPL this OTA was replaced by a BA6110 SIL chip
Pedal is in excellent working order with only some cosmetic wear on the body and paint.