Tested all 5 channels with a Orange RX R615X DRX 6ch. There is a small fitting on the top left corner of TX, I don't know if it is a switch is broken or missing it's handle or what(?). Servo reversing and V-tail mixing are located under small cover on the lower left front.
The dsmx range of transmitters and receivers covers all angles from vehicle types (boats, cars, drones and planes) and sizes, from small park zone to larger more serious models. I'd strongly recommend this as a excellent all rounder. Note the LP is a lower power version but more than adequate for most purposes.