Features:Combined guitar effects, 3 effects (Compressor + Tube Overdrive + Ultimate Overdrive) + 8 DC 9V power supply outputs.Compressor: classic dynamic compressor based on the DYNA COMP creates infinitely clean sustain, with output level and sensitivity control knobs.Overdrive 1: based on the Tube overdrive(ts9), with Drive, Tone and Level adjusting knobs. Drive--Adjusts the amount of distortion; Tone--Adjusts the amount of treble in the sound; Level--Adjusts the output volume of the pedal.Overdrive 2: based on the obsessive overdrive(OCD), with Drive, Tone, Vol control knobs and HP/LP switch. Drive--Adjusts the amount of overdrive; Tone--Adjusts frequency in the sound; Vol--Adjusts the output volume; HP/LP switch--The High-Peak function gives you increased distortion and low-end, thickening up your sound for a more "British" flavor. The Low-peak mode gives you a more accurate rendition of your sound with very little coloration of your tone.Power Supply Outputs: 8 isolated power supply outputs for guitar effects(7 * outputs DC 9V 100mA; 1 * output DC 9V 500mA).Specifications:Material: MetalPower Supply: DC 9V power adapter(not included)Item Size: 19 * 12 * 3.5cm / 7.5 * 4.7 * 1.4inItem Weight: 655g / 1.4lbPackage Size: 22.5 * 12 * 6cm / 8.9 * 4.7 * 2.4inPackage Weight: 730g / 1.6lbNote:Power adapter is not included.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 Pedal