Normally USB specifications limit connections to a maximum run of only 15ft. This can make placement of USB devices difficult, especially when longer runs are required in schools, conference rooms and other spaces that require a plenum cable. This 25 foot Plenum cable is jacketed with a fire-retardant plastic jacket of either a low-smoke polyvinyl chloride (PVC) or a fluorinated ethylene polymer (FEP). Local building codes may require all cables run inside the walls or ceiling be Plenum rated. This Plenum USB Extender Cable eliminates the USB length constraints and allows for extended USB connections in plenum space.