US power supply INPUT: 100~240V AC 50/60Hz 0.3A OUTPUT: 9V 1A 3 way power cable adapter for use with electric guitar mutiple effect pedals Hign quality daisy chain with special anti-hum. Power chain DC cables specially designed for guitar players who want to power few pedals at the same time with only one adaptor or one outlet from the power supply. The professional noise isolation performance ensures you a quiet pedal chain condition while you play.