Features:  Combined guitar effects, 3 effects (Compressor + Tube Overdrive + Ultimate Overdrive) + 8 DC 9V power supply outputs.  Compressor: classic dynamic compressor based on the DYNAs 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: Metal;  Power Supply: DC 9V power adapter;  Power Adapter: 100-240V US/ EU/ UK plug (optional);  Item Size: 19 * 12 * 3.5cm / 7.5 * 4.7 * 1.4in;  Item Weight: 655g / 1.4lb;  Package Size: 29 * 13 * 7cm / 11.4 * 5.1 * 2.8in;  Package Weight: 950g / 2.1lb.     Package List:  1*Effector;  1*Manual.