The PMX-USBP is a universal port for SXS and Marine applications that extend the USB input on Rockford Fosgate source units. It features a hinged cover to protect against water and dust intrusion. The USB input port can be used to charge your mobile device, play audio from your mobile device or USB jump drive, and update firmware on your source unit (functionality based upon supported features of source unit.) A universal USB port for SXS and Marine applications extends the back panel's USB input on PMX source unitsCharge your mobile device, play audio from your mobile device or USB jump drive, and update firmware on your source unitHinged cover protects against the elementsCompatible with the PMX-0, PMX-1, PMX-2, PMX-3, PMX-5CAN, PMX-8BB, and PMX-HD9813Mounts in a 7/8" dia. hole and mounts to any surface from 1/8" up to 1-1/4" thick3' cableFull 2-year warranty