The Interruption IT-1 from Audible Disease is a simple to use but very useful 4-channel kill switch. If your mixer doesn't have channel MUTE functionality, this is the pedal for you! Each channel is independent of each other and is controlled by a heavy-duty stomp switch. An LED for each channel lets you know if the channel is on or off - blue for on and red for off. Made with the absolute highest quality parts. Operates a standard 9-volt negative tip barrel type adapter only (not included).