Brand: Ernie Ball Style: Delay,Expression Color: Black Normally open momentary footswitch One ¼” output jack No power required Works with Ernie Ball Expression series Ambient Delay Can be used with a variety of pedal types The Ernie Ball Tap Tempo is the perfect companion to the Ernie Ball Expression Series Ambient Delay or any other pedal requiring a standard normally-open momentary footswitch. Tap the switch to set the tempo and hear your delay rate (or other effect) sync up, bringing studio quality, time-based effects to your live performances.