The One Control Minimal Series Black Loop with BJF Buffer is a 2-loop switcher featuring a switchable BJF buffer on the input and two DC outputs. It can be used as a loop switcher with true bypass or buffered bypass while supplying power to the effects pedals connected to Loop1 and Loop2. Each effects loop uses a standard true bypass switching style, and by switching the input buffer on or off, it can be used in the same way as buffered bypass. This is also effective when connecting multiple effects pedals to a single effects loop, or when using older effects pedals. - By connecting one of the effect loop SENDs to a tuner, it can be used as both a mute switch and a tuner output. • By connecting one of the effects loop's SEND outputs to another amplifier, it can also be used as a switch to toggle between multiple amplifiers. LOOP1: Turn on the LOOP on the right. LOOP2: Turn on the LOOP on the left. If the BJF Buffer in the input section is set to OFF, the device can be operated without supplying power (the LED will not light up). *One screw on the back cover is broken.Condition: No problems with use. Points to note: *One screw on the back cover is broken. Accessories: None. Warranty: No warranty. Sold as is.