Features:Pure analog phaser effect pedal with warm and plump sound.2 working modes: VINTAGE- return back to the 1974s with warm and illusion classical phaser effect; MODERN- gain more depth to modern plump phaser effect.SPEED knob adjusts the vibration speed of the phaser effect.True bypass provides transparent tone; LED indicator shows the working state.Mini size design, aluminum alloy shell, portable and durable.Specifications:Material: aluminum alloyInput:1/4 inch Monaural Jack (Impedance:470K Ohms)Output:1/4 inch Monaural Jack(Impedance:10K Ohms)Power Supply:DC 9V(Plug polarity is Positive on the barrel and negative in the center)Working Current: 6mAItem Size: 3.8 * 9.5 * 3.5cm / 1.5 * 3.7 * 1.4inItem Weight: 200g / 7ozPackage Size: 12 * 6.5 * 6.5cm / 4.7 * 2.6 * 2.6inPackage Weight: 270g/ 9.5ozNote: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)