Elixir Acoustic 80/20 Bronze Acoustic Guitar Strings with Nanoweb Coating - Custom Light (11 15 22 32 42 52) 3-Pack Category_Headphones You should only use one

You should only use one of the AC outlets matching the needed voltage for your pedal and leave the other not used

660mA at 9V DC on each outlet

deliver flexible

tuners and much more handy

Elixir Acoustic 80/20 Bronze Acoustic Guitar Strings with Nanoweb Coating - Custom Light (11 15 22 32 42 52) 3-Pack Category_Headphones You should only use oneACOUSTIC 80 20 BRONZE WITH NANOWEB COATING Elixir Acoustic 80 20 Bronze Strings with NANOWEB Coating deliver a bright, lively tone together with extended tone life that players have come to expect from Elixir Strings. Elixir Strings, the #1 acoustic guitar string* Only coated string brand to protect the entire string with an ultra thin coating, keeping gunk out of the gaps between the windings Extended Tone Life players report their tone lasts longer