• Connects 18V pedals to two 9V outputs on the Strymon Zuma or Ojai power supply. Also connects 24V pedals to two 12V outputs on the Zuma. Power supply connectors: 2.1mm straight (2) Pedal connector: 2.1mm female Polarity: standard (center negative). Length: 4″/10cm. Compatible pedals include some pedals by Fulltone, Keeley, MXR and Dunlop (Cry Baby).