The BLACK BOX SWL036A ABC SWITCH 2-1 RJ11 is a KVM switch box designed to efficiently manage connections between multiple computers and a single monitor. With a 1:1 connection split/duplication, this switch allows users to easily switch between two devices. The RJ-11 connector ensures compatibility with the specified Black Box model, making it a reliable and convenient solution for navigating through multiple computer setups. Ideal for those looking to streamline their workspace and simplify their setup, the Black Box SWL036A switch offers a seamless and user-friendly experience.  Serial Number 0613180133.  Shipped from a smoke-free home via USPS Ground Advantage.