1The overdrive effect has low gain, and the VOICE knob can adjust different types of EQ frequency bands. 2With more comprehensive tones and functions, with transparent tones, to minimize tone loss to maintain sound quality. 3The input impedance is 2.2M, and the output impedance is 1K, which has strong practicability and safer operation. 4The effect shell is made of all metal material, resistant to friction and impact, and has a long service life. 5This effect has a compact structure and does not take up space, very suitable for electric guitar lovers. Item Type: Overdrive Effect Material: Metal Color: Silver gray Input Impedance: 2.2M Output Impedance: 1K Working Current: 20mA Working Voltage: DC 9V (external positive internal negative)(not including adapter) 1 x Effect 1 x User Manual 4 x Foot Pads The positive and negative poles of the power supply must be the same as the positive and negative poles of the effector when connecting.