This HVUSB1 USB (Universal Serial Bus)-DC cable can be used to power a HVE290 HDMI-over-IP Converter. Each HVE290 Converter unit needs power either from the AC/DC power supply or, if you have many sender units, you may prefer a multi-outlet USB (Universal Serial Bus) power supply (of adequate power/ Amps). USB (Universal Serial Bus) DC cables are available as an optional accessory.