Features:            3 Reverb Modes: Room, Spring, Shimmer             Room: 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 sound           Specifications:            Color: Gray             Suitable for: Electric guitar             Material: Aluminium alloy & PCB             Effect modes: Room, Spring, Shimmer             Input: 1/4'' monaural jack (impedance: 470k Ohms)             Output: 1/4'' monaural jack (impedance: 100 Ohms)             Power requirements: AC adapter 9V DC             Current draw: 128mA             Item size: 9 * 3.5 * 3.2 cm / 3.5 * 1.4 * 1.3in             Item weight: 155g / 5.5oz             Package size: 10.5 * 6 * 4.6cm / 4.1 * 2.4 * 1.8in             Package weight: 173g / 6.1oz           Package List:            1 * Reverb pedal             1 * User manual (English & Chinese)            Note:            The power adapter are not included.             Please use the 9V power adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly.