Our RAT2 ships w/ center-negative 2.1mm barrel jack!
(Farewell eighties-era 1/8" jack)
Don't settle for the competitions outdated stock of a model that hasn't been produced in three YEARS!
The modern power-in barrel jack allows use of standardized, readily available, 2.1mm 9VDC power supplies!
2.1mm center-negative barrel jack simplifies daisy-chaining with your other similarly equipped 9VDC pedals
When a 9VDC battery is being used rather than an external power supply, there is no operational change.