Coleman Cable 94605-66-18 Bulk Speaker Wire, 16-Gauge 2-Conductor AWG 500-Feet Spool 100-Feet spool of wire CMR/CL3R Overall-Shielded Cable, AWG size: 18/4 Features PVC with sun resistant jacket Power limited circuit for riser or non-riser applications For remote control, signaling, security systems, communications, intercom, and sound/audio