This is a 2-in-2-out junction box featuring a clone of the Klon Centaur's buffer section. Handmade, this buffer clone is highly regarded for improving sound quality and noise resistance, simply by connecting it. The two lines each have independent grounding to suppress noise caused by ground loops. The buffer's ground is connected to the case ground. The circuit board is meticulously hand-wired point-to-point. It supports a standard 9V center-negative AC adapter for power. Op-amp: Texas Instruments TL072CP Wiring: Belden 8503 and others Solder: Kester 44 and others Case: 1590A size (approx. W93 x D39 x H31mm) LED: 3mm blue The case has been polished. Please note that there are some polishing scratches. In the first photo, the right side is the buffer line (in/out designated), and the left side is the through line (in/out flexible). Photos 5 and later are reference images of past products. After your order, it will be shipped anonymously and free of charge within 1-2 days. In the unlikely event of an initial defect, we will provide free support. This product takes measures to minimize noise, such as separating the ground of each line and grounding the unused output of the op-amp, paying attention to the details. You may find that some commercially available products neglect these aspects, so we recommend checking them when selecting a junction box or buffer. junction box Klon Centaur buffer