This power supply works with most compact effects pedals. I've used it with Boss, Maxon, and various other compact effects pedals without any issues. MODEL: ZDA090055JP INPUT: AC 100-240V 50/60Hz 20VA OUTPUT: 9.0V 550mA I believe this was originally included with the purchase of a guitar effects pedal. It can be used with standard 9V-powered guitar/bass effects pedals. ● Contents: ・Power supply unit ×1 ● Condition: I have tested it before listing and confirmed that it is working properly. There are no noticeable scratches or stains, and it is in good working condition. ● Other Notes: You can purchase this item immediately. Please consider this item as a used product.