EFFECT PEDAL The PRS Mary Cries Optical Compressor Pedal is intuitive and sounds amazing. Based on the famous LA-2A, the Mary Cries fattens the sound, helps control signal peaks, lengthens sustain, and pushes the sound without losing definition or clarity. Depending on your setup, it can be used as a boost or directly as a compressor. Fully analog pedal. 1x ¼'' Jack instrument input/output. True Bypass. 9v DC adapter (not included). Dimensions: 11.9 x 9.4 x 3.5 cm. Weight: 0.49Kg.