The Polarbear Effects Drowner V4 is a combined distortion and reverb pedal designed for creating ambient and shoegaze-style textures. It features a high-gain distortion circuit paired with a digital reverb section. The pedal offers controls for Distortion, Tone, Volume, Reverb, and Reverb Decay. A toggle switch allows selection between different reverb voicings. The distortion and reverb sections can be used independently or together. The unit is housed in a compact metal enclosure for pedalboard use.