Pure analog full circuit delay, clear, full and smooth new delay effect.True bypass provides transparent tone, LED indicator shows working status.3 knobs, is mix, TIME is 20-620ms delay, FEEDBACK is repeat.The manufacturer of this delay pedal. Rugged construction with an all-aluminum housing.The organic sounding analog delay pedal combines the sound of classic tape/ delays with a modern delay design to produce an extremely versatile sounding delay pedal.The LEF-314 features an adjustable delay time ranging from 20ms to 620ms for a variety of styles.The control adjusts the length of time the delayed sound is played, while the feedback knob controls the intensity of the delayed sound. The LEF-314 is a true analog delay with feedback, capable of creating a positive feedback loop, perfect for closing out a show supply: 9V DC ( negative pole).not incl Knob: adjustment level delay.F. Rear knob: F. Back to adjust the delay of feedback.Time Knob: The control delay time is 25ms-600ms.Input and output jacks: analog 1/4inch mono audio .LED light: LED indicator shows the working status.Full metal shell: aluminum alloy classic, stable and firm.True Bypass: The true bypass of .Input Impedance: 1m OhmsOutput Impedance: 470k Ohms supply: DC 9V (plug polarity is positive on the barrel and negative on the center)Working current: 42mAColour:WhiteMaterial: alloySize:95 x 44 x 48mmPackage Contents:1 x Delay Effect PedalOnly the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.