The Antop 2-way Splitter AT-705 splits a single incoming coaxial signal, such as satellite signal, over-the-air HD (digital TV) antenna signal, into two outgoing signals. Precision zinc die-cast with 18K gold-plated chassis for maximum signal transfer, corrosion resistance, and reliable connectivity. All ports DC Power Passing enables DC power from all outputs to pass the power to the input (or in the opposite direction). Thus all satellite receivers can supply LNB power, while all amplified outdoor antenna or masthead amplifier can be powered from the interior power supply devices. Care should be taken to ensure the input of a receiver will not be damaged by power from another receiver. Reverse powering protection is provided in many receivers and systems.