CI 5120 Split Dual VOR/LOC/GS Frequency 108-118 MHz & 329-335 MHz
(DAI Part# CI5120)
Designed for use with Garmin GNS 580 and similar systems. The CI 5120 splits single coax antenna input into equally proportioned VOR/ LOC/GS outputs, allowing you to run two single input receivers off of one antenna.