Broan-NuTone IW2-500UL-N Twisted Pair Wire (UL Listed), 500 ft., 22 gauge NuTone Intercom Wire is an integral part of all NuTone Radio Intercom Systems; such wire has been designed to enable full system performance and to minimize outside interferen ce, dimmer noise, radio frequency interference and other reception problems. If wire other than NuTone specified wire is used in the installation of a NuTone Radio Intercom, the Warranty shall not be applicable to any defect or problem relating to th e use of non-NuTone specified wire. Broan-NuTone IW2-500UL-N Twisted Pair Wire (UL Listed), 500 ft., 22 gauge Features: • UL Listed • 500 ft. • 22 ga. • Twisted Pair 22/2 Cable (UL Listed