All Aiphone wire is stranded unless otherwise indicated. Non plenum wires have a gray jacket. Plenum wires have a natural jacket. Multi-conductor with an overall shield. Technically matched to designated system's wire specifications. Extends product warranty by one additional year. UL and c(UL)us listed. RoHS III and REACH compliant. 22 AWG 3 conductors 7 strands bare copper wire with PVC insulation, an aluminum/Mylar tape shield (100 percent coverage), and an overall PVC jacket for low-voltage electronic cable applications.