The Keeley Parallax combines dual-engine processing in a compact pedalboard format—delay and reverb working independently or in tandem. The delay section delivers warm, analog-style repeats with three modulation options (Off, Light, Deep), while the reverb side features three distinct algorithms: Soft Focus for lush, vintage textures inspired by classic 80s rack units; Reverse for envelope-triggered vibrato and pitch effects without a tremolo bar; and Hall with ascending shimmer for infinite octave feedback loops. Each side offers intuitive controls—Rate, Blend, and Repeats for delay; Decay and Depth for reverb character. Built for shoegaze, ambient, and experimental players seeking atmospheric depth without sacrificing mix clarity. This pedal is in good condition.