Rowin LEF 319 Guitar Noise Gate Pedal Noise Killer Pedals Noise Suppression Effects For Electric Guitar Hard Soft 2 ModesNoise Gate pedal: reduces the noise from input signal without loweringthe quality of your original signal.Adjusting the noise reductionDegree:70 more and less 10db2 modes: hard Mode: provide hard effect of noise reductionsoft Mode: provide soft effect of noise reductionSolid construction: made of high-quality zinc alloy, durable and sturdyTrue bypass: true bypass provide transparent tone. Led indicator showsworking state.Mini size: small and exquisite, can save a lot of space on pedal boardNote: please note this pedal can not powered by batteries. Need a DC 9Vpower supply with negative in the center to power up.PromiseReduces the noise from input signal without lowering the quality of your original signal.Made of high quality zinc alloy,durable and sturdy.True Bypass provide transparent tone.LED indicator shows working state.SpecificationsInput Impedance: 1m Ohmsutput Impedance: 100k OhmsPower Supply: DC 9VPlug polarity is Positive on the barrel and negative in the centerWorking Current: 26mAWorking Modes2 Working Modes: Hard and Soft.Hard: Provide hard effect of noise reduction.Soft: Provide soft effect of noise reduction.