An ultra-compact, high-performance AB box that minimizes waste. A simple yet versatile utility pedal that can withstand professional use. 1 in → 2 out, or 2 in → 1 out switching is possible. As a regular AB box, it can switch one signal to two systems (e.g., switching between amp A/B). Conversely, it can also be used as an input selector to switch between two instruments to one amp. Passive circuit & true bypass design Operates without power. True bypass switch adopted to minimize sound quality degradation. Highly visible LED indicator (when using power) By connecting a DC9V center-negative adapter, the output status can be viewed with an LED. This is an AB BOX made by OneControl, and you can switch between OUTPUT RED and OUTPUT BLUE. I used it in the studio about twice, but I haven't used it much since then. There are no scratches on the body. Everything in the photos is included; there is no product box from the time of purchase. Thank you for viewing.