I have been able to connect any of my guitar pedal power supplies to a 9v power supply/battery connector which I also purchased here at Revain. (amazon.com/gp/product/B07FCZZ5JF/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1) Some of the 9 volt battery devices that I own and rely on were not made with power connectors. Two connected Revain parts allow me to use devices without batteries.
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