A device adapted for attachment to a coupler of a trailing railcar of a train includes an enclosure defining an internal compartment, a port adapted for connection to an air brake hose receiving air from a brake pipe of the train, a handle extending from the enclosure, a communication device disposed within the internal compartment of the enclosure, and at least one antenna connected to the communication device and extending at least partially through the internal compartment of the enclosure and into an internal cavity of the handle.