Features:Mini guitar delay effect pedal with true bypass.Pure analog circuit delay, clear, plump and smooth new delay effect.3 control knobs: tone of delay effect, degree of feed back, time of delay effect.With LED indicator showing working status.Aluminum alloy body, durable and sturdy.Specifications:Input: 1/4" Monaural JackOutput: 1/4" Monaural JackTime of Delay: 20ms-620msInput Impedance: 1M OhmsOutput Impedance: 490 OhmsWorking Current: 42mAPower Supply: DC 9V (Plug polarity is positive on the barrel and negative in the center)Item Size: 3.8 * 9.5 * 3.5cm / 1.5 * 3.7 * 1.4inItem Weight: 210g / 7.4ozPackage Size: 6.3 * 12 * 6.5cm / 2.5 * 4.7 * 2.6inPackage Weight: 277g / 9.8ozPackage List:1 * Effect Pedal1 * User Manual (English & Chinese)