The driving trailer Btzx 803 is seen coupled with the railcar Bzmot 410 at Dévaványa

Trains from Gyoma to Vésztő have to switch direction at Dévaványa as the original main direction was on to Kisújszállás. Since that railway is abandoned, but both the Gyoma and the Vésztő tracks come in at the same end, trains have to reverse, and that's why the cab units come handy. They have a cab at only one end and heating or cooling by the air conditioning is achieved by energy from an auxiliary diesel generator.