This special Flex cable as the name implies makes a parallel connection of two outlets of a CIOKS power supply. A parallel connection adds the currents of the two outlets used. If used with two 9V outlets rated at 200mA, you'll still get 9V but with a current rating of 400mA. You can use the Parallel adapter Flex with any of the standard Flex cables to match the type, size, and polarity of the pedal's power input socket. You should only use the Parallel adapter Flex with two outlets with exactly the same voltage setting and preferably with the same current rating. If you wish to add voltages instead of current, have a look at the Series adapter Flex with order no. 2200 or the two Stack Flex types.