Nathan Air Chime K5LA train horns. These are actual train horns not the three bell ones advertised as train horns online. Included are the horns, the manual metering valve which allows you to get the woo woo kind of sound a train makes, a Viair compressor, and all the relays and fuses needed. This is an obviously used set so everything is used but working when removed. What’s not included is the air hoses needed or the air tank needed.