Features:Compact size noise reduction pedal, aluminum alloy shell, lightweight and durable.2 working modes: HARD(hard effect of noise reduction)/ SOFT(soft effect of noise reduction), selected by the toggle switch.With one control knob for adjusting the noise reduction degree.True bypass, and with LED light for indicating effect or bypass status.Specifications:Material: Aluminum AlloyInput: 1/4 Monaural Jack (Impedance: 1M Ohms)Output: 1/4 Monaural Jack (Impedance: 100 Ohms)Power Supply: DC 9V (plug polarity is negative in the center)Working Current: 26mAItem Size: 3.8 * 9.5 * 3.5cm / 1.5 * 3.7 * 1.4inItem Weight: 205g / 7.2ozPackage Size: 12 * 6.5 * 6.5cm / 4.7 * 2.6 * 2.6inPackage Weight: 275g / 9.7ozNote:Please use the power adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly.Package List:1 * Effect Pedal1 * User Manual (English)