Features:3 Reverb Modes: Room, Spring, ShimmerRoom: Different sized true acoustics reverb, from room to hall.Spring: Simulates a classic spring reverberation, vintage 60's Surfing sound.Shimmer: Add rich overtone into the reverb sound, spacy, smooth and shining, very popular in Post Rock music.True bypass design to minimize the tone loss.Mini size is space-saving and easy to carry along.Durable aluminum alloy case with stove varnish finish.Level, Color, Decay knobs:Level: Adjust the level of the reverb sound;Color: Adjust the tone of the reverb sound in Room mode; Adjust the volume of the particular spring effects in Spring mode; Adjust the brightness of the overtone in Shimmer mode;Decay: Adjust the decay time of the reverb soundSpecifications:Color: GraySuitable for: Electric guitarMaterial: Aluminium alloy & PCBEffect modes: Room, Spring, ShimmerInput: 1/4" monaural jack (impedance: 470k Ohms)Output: 1/4" monaural jack (impedance: 100 Ohms)Power requirements: AC adapter 9V DCCurrent draw: 128mAItem size: 9 * 3.5 * 3.2 cm / 3.5 * 1.4 * 1.3inItem weight: 155g / 5.5ozPackage size: 10.5 * 6 * 4.6cm / 4.1 * 2.4 * 1.8inPackage weight: 173g / 6.1ozPackage List:1 * Reverb pedal1 * User manual (English & Chinese)