8 Isolated Outputs: Optimized to handle a wide range of pedal types with six fixed voltage outputs and 2 variable outputs, all separate from each other with no common ground loops. This eliminates the possibility of hum or noise issues from power outlets sharing the same ground. Powers up to 8 guitar and bass effect pedals. Eliminates the possibility of experiencing ground oriented hum or noise issues between the pedals in your 'stage rig'. Each output is optimized to handle a wide range of pedal types with six fixed voltage outputs and 2 variable outputs.