One Control White Loop Flash Switcher Pedal Flash Loop Function: Left footswitch toggles between the two (Red & Green) loops. Right footswitch bypasses whole pedalboard Different Uses: AB Switch Amp Channel Switcher Tuner Output/Mute Switch 2x DC outputs to add extra power to your pedalboard The White Loop can be used without DC power, however the LEDs will not function. The White Loop is a two loop true bypass looper What separates the White Loop from many other similar products is the flash loop function The White Loop has a green and red loop One switch toggles between these two loops