Boss AB-2, 2-Way A / B switch, Optionally switches two inputs to one output or two outputs to one input, Circuit with active electronics: Noiseless switching, no influence on the switched signals (-20 dBU inputs and outputs), Display of the switching state by means of a red LED (Channel A) and a yellow LED (Channel B), Power supply by 2 x Micro-battery (AAA-Size), Power consumption max. 5 mA therefore approx. 100 operating hours