The Datavideo PD-4A Power Distributor comes with a redundant power supply, which is a second power supply that provides power just in case the first one fails. This PD-4A Power Distributor lets you use a single power cord with no additional power supplies for the switcher, processor, and other devices that operate on 12VDC. This power distributor includes two independent AC inputs as well as a DC input for battery backup, offering mission critical reliability for your switcher, recorder, and monitors with this redundant power supply.