Cisco RJ Plug Headset Adapter Converter to Apple Iphone Ipad Ipod Stereo Headset Headphones [COMPATIBLE] Only work with Cisco Phone 79xx Series and iphone headset plug ONLY [FUNCTION] Convert Cisco 79XX headset solution to your exist iPhone headset All functions on headset and phone would function same Easy Setup, Plug and Play [NOTICE] ONLY work with Cisco Phone 79xx series, NOT for CP-Series, Not for other brand telephone.