Features Effect: Classic fuzz effect, plump and rich, providing you with a nice sound from distortion to fuzz. Volume Knob: Control the sound volume with Fuzz effect. /Tone Knob: Adjust the depth of Fuzz tone. /Sustain Knob: Adjust the degree of Fuzz sound. Meterial: Made of high quality Aluminium zinc alloy, durable and strong. Classic mini size can save a lot of space on pedal board. True Bypass: LED indicator shows the working state. True Byapass switch lets your instrument signal pass through a non-electronic bypass line when the effect is disengaged. Note: Please note this pedal cannot powered by batteries. Need a DC 9V power supply with negative in the center to power up. Please buy it separately at SOOMME Music Store. Hope you will enjoy and use this Guitar Fuzz Pedal. Specifications INPUT: 1/4"monaural jack(impedance:2. 2M Ohms) OUTPUT: 1/4"monaural jack(impedance:1 0K Ohms) Power Supply: DC adapter 9V Current Draw : 100mA(DC 9V) Dimensions: 3.74 x 1.77 x 1.89 inches Weight: 0.6pounds Package included 1 x ISET FUZZ Pedal 1 x User Manual Warranty 12 months warranty. If you have any problems, please feel free to contact with us, our team will give you a satisfactory after-sales service within 24 hours.