BOSS AB-2 2-Way Selector. This is a footswitch that allows you to switch between two inputs to one output, or one input to two outputs, such as switching between two guitars or two amplifiers. I have not tested its functionality. I do not have the equipment to test it. It has been stored at home. Please understand this before purchasing. This is a used item. Please check the photos carefully and assess the condition. I do not have any knowledge of this product, so I cannot judge its condition. This is an unwanted item and has not been maintained, so I am listing it as junk. Would anyone who can repair it be interested? As this is a used item, there are noticeable stains and scratches. Please note that I cannot completely clean it.