One Control Minimal Series Black Loop with BJF Buffer / 2-loop switcher. With box. This is a used item, so please purchase only if you understand this. Operation has been confirmed. It works without any problems. Please refrain from purchasing if you are nervous about used items. ____ Quoted from Amazon It is effective when connecting multiple effectors to one effect loop, or when using old effectors. ・By connecting to a tuner from the SEND of one effect loop, it can be used as a mute switch and tuner out. ・By connecting to another amplifier from the SEND of one effect loop, it can also be used as a switch to switch between multiple amplifiers. LOOP1: Turns ON the right LOOP. LOOP2: Turns ON the left LOOP. If the BJF Buffer in the input section is set to OFF, it can also be operated without supplying power (the LED will not light up). ●BJF Buffer The BJF Buffer is overwhelmingly natural, overturning the image of many "buffers". ・To make the gain exactly 1. ・To not change the sound with the input impedance. ・To not make the output too strong. ・To minimize noise. ・To prevent the sound from deteriorating when overloaded. The BJF Buffer, which was completed by meeting BJF's conditions for buffers, is helping guitar signals at the feet of many professionals around the world. While the effect of many effects becomes stronger the more they are connected later, the effect of the buffer is greater the more it is connected earlier. This is the meaning of incorporating the BJF Buffer in the input section. By turning ON the BJF Buffer, you can stabilize the overall tone to a warm and natural tone. The Black Loop operates with a center-negative DC9V adapter. The current capacity supplied from the DC Out varies depending on the adapter you use. Size: 61D x 111W x 31H mm (excluding protrusions) 66D x 121W x 49H mm (including protrusions) Weight: 390g